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1.
J Head Trauma Rehabil ; 39(3): 207-217, 2024.
Article in English | MEDLINE | ID: mdl-38709829

ABSTRACT

OBJECTIVE: Post-9/11-era veterans with traumatic brain injury (TBI) have greater health-related complexity than veterans overall, and may require coordinated care from TBI specialists such as those within the Department of Veterans Affairs (VA) healthcare system. With passage of the Choice and MISSION Acts, more veterans are using VA-purchased care delivered by community providers who may lack TBI training. We explored prevalence and correlates of VA-purchased care use among post-9/11 veterans with TBI. SETTING: Nationwide VA-purchased care from 2016 through 2019. PARTICIPANTS: Post-9/11-era veterans with clinician-confirmed TBI based on VA's Comprehensive TBI Evaluation (N = 65 144). DESIGN: This was a retrospective, observational study. MAIN MEASURES: Proportions of veterans who used VA-purchased care and both VA-purchased and VA-delivered outpatient care, overall and by study year. We employed multivariable logistic regression to assess associations between veterans' sociodemographic, military history, and clinical characteristics and their likelihood of using VA-purchased care from 2016 through 2019. RESULTS: Overall, 51% of veterans with TBI used VA-purchased care during the study period. Nearly all who used VA-purchased care (99%) also used VA-delivered outpatient care. Veterans' sociodemographic, military, and clinical characteristics were associated with their likelihood of using VA-purchased care. Notably, in adjusted analyses, veterans with moderate/severe TBI (vs mild), those with higher health risk scores, and those diagnosed with posttraumatic stress disorder, depression, anxiety, substance use disorders, or pain-related conditions had increased odds of using VA-purchased care. Additionally, those flagged as high risk for suicide also had higher odds of VA-purchased care use. CONCLUSIONS: Veterans with TBI with greater health-related complexity were more likely to use VA-purchased care than their less complex counterparts. The risks of potential care fragmentation across providers versus the benefits of increased access to care are unknown. Research is needed to examine health and functional outcomes among these veterans.


Subject(s)
Brain Injuries, Traumatic , Veterans , Humans , Brain Injuries, Traumatic/therapy , Brain Injuries, Traumatic/epidemiology , Male , Female , United States , Retrospective Studies , Adult , Middle Aged , Prevalence , United States Department of Veterans Affairs , Iraq War, 2003-2011 , Veterans Health Services , Afghan Campaign 2001-
2.
Clin Gerontol ; : 1-11, 2023 Sep 04.
Article in English | MEDLINE | ID: mdl-37665611

ABSTRACT

OBJECTIVES: Veterans experience high rates of fatal and non-fatal firearm injuries. This risk may be compounded among Veterans who are rural-residing, aging, and/or experiencing cognitive decline or dementia. Firearm safety discussions are not broadly implemented across Department of Veterans Affairs (VA) healthcare settings due, in part, to concerns of causing Veterans to disengage from care. This study examines perceptions about firearm safety discussions to inform healthcare-based harm-reduction efforts. METHODS: We conducted interviews with 34 Veterans (median age 70) and 22 clinicians from four VA facilities that treat high rates of rural patients with firearm-related injuries. RESULTS: Most Veterans accepted the idea of universal firearm safety discussions at the VA. Some reported they might not be forthright in such discussions, but raising the topic would not stop them from engaging with VA care. Veterans and clinicians unanimously endorsed firearm safety discussions for older patients experiencing cognitive decline or dementia. CONCLUSIONS: VA patients and clinicians are amenable to firearm safety discussions during healthcare visits and especially endorse the need for such discussions among high-risk populations. CLINICAL IMPLICATIONS: Universal firearm safety discussions could be incorporated into standard VA practice, particularly for Veterans experiencing cognitive decline or dementia, without risking Veteran disengagement from care.

3.
Bioorg Med Chem Lett ; 90: 129347, 2023 06 15.
Article in English | MEDLINE | ID: mdl-37236376

ABSTRACT

Due to the central role of tubulin in various cellular functions, it is a validated target for anti-cancer therapeutics. However, many of the current tubulin inhibitors are derived from complex natural products and suffer from multidrug resistance, low solubility, toxicity issues, and/or the lack of multi-cancer efficacy. As such, there is a continued need for the discovery and development of new anti-tubulin drugs to enter the pipeline. Herein we report on a group of indole-substituted furanones that were prepared and tested for anti-cancer activity. Molecular docking studies showed positive correlations between favorable binding in the colchicine binding site (CBS) of tubulin and anti-proliferative activity, and the most potent compound was found to inhibit tubulin polymerization. These compounds represent a promising new structural motif in the search for small heterocyclic CBS cancer inhibitors.


Subject(s)
Antineoplastic Agents , Tubulin , Tubulin/metabolism , Antineoplastic Agents/chemistry , Molecular Docking Simulation , Structure-Activity Relationship , Cell Proliferation , Cell Line, Tumor , Tubulin Modulators/chemistry , Colchicine/chemistry , Binding Sites , Indoles/chemistry , Drug Screening Assays, Antitumor
4.
J Gen Intern Med ; 38(7): 1647-1654, 2023 05.
Article in English | MEDLINE | ID: mdl-36922468

ABSTRACT

BACKGROUND/OBJECTIVE: The VA MISSION Act aimed to increase Veterans' access to care by allowing eligible Veterans to use VA-paid care from non-VA providers ("VA-purchased care"). We interviewed Veterans who were eligible for both VA-delivered and VA-purchased care to examine factors they consider when making decisions about whether to use VA-delivered or VA-purchased care. METHODS: We conducted semi-structured interviews with 28 Veterans across the USA who were eligible for VA-delivered and VA-purchased care, using deductive and inductive analysis to develop themes. Participants were recruited from a survey about healthcare access and decision-making. More than half of participants lived in rural areas, 21 were men, and 25 were > 50 years old. KEY RESULTS: Veteran participants identified (1) high-quality relationships with providers based on mutual trust, empathy, authenticity, and continuity of care, and (2) a positive environment or "eco-system of care" characterized by supportive interactions with staff and other Veterans, and exemplary customer service as integral to their decisions about where to receive care. These preferences influenced their engagement with VA and non-VA providers. We discovered corresponding findings related to Veterans' information needs. When making decisions around where to receive care, participants said they would like more information about VA and non-VA providers and services, and about coordination of care and referrals, including understanding processes and implications of utilizing VA-purchased care. DISCUSSION/CONCLUSION: Current VA-purchased care eligibility determinations focus on common access metrics (e.g., wait times, distance to care). Yet, Veterans discussed other important factors for navigating care decisions, including patient-provider relationship quality and the larger healthcare environment (e.g., interactions with staff and other Veterans). Our findings point to the need for health systems to collect and provide information on these aspects of care to ensure care decisions reflect what is important to Veterans when navigating where to receive care.


Subject(s)
Veterans , Male , United States , Humans , Middle Aged , Female , United States Department of Veterans Affairs , Health Services Accessibility , Professional-Patient Relations , Qualitative Research
5.
Mil Med ; 188(9-10): 3191-3198, 2023 08 29.
Article in English | MEDLINE | ID: mdl-36179086

ABSTRACT

INTRODUCTION: Women Veterans of the Persian Gulf War (GW) expanded the military roles they had filled in previous military eras, with some women engaging in direct combat for the first time. Many GW service members, including women, had unique combat exposures to hazardous agents during deployment, which might have contributed to the development of chronic health problems. This study aims to understand the experiences of women GW Veterans (GWVs) as it is related to their military service and subsequent health in order to better inform and improve their clinical care. MATERIALS AND METHODS: We conducted in-depth interviews with 10 women GWVs to understand their experiences and perspectives about how their military service in the Gulf has impacted their lives and health. We used an integrated approach of content analysis and inductive thematic analysis to interpret interview data. RESULTS: Besides having many of the same war-related exposures as men, women faced additional challenges in a military that was inadequately prepared to accommodate them, and they felt disadvantaged as women within the military and local culture. After service, participants had emergent physical and mental health concerns, which they described as developing into chronic and complex conditions, affecting their relationships and careers. While seeking care and service connection at Veterans Health Administration (VA), women voiced frustration over claim denials and feeling dismissed. They provided suggestions of how VA services could be improved for women and GWVs. Participants found some nonpharmacological approaches for symptom management and coping strategies to be helpful. CONCLUSIONS: Women in the GW encountered challenges in military and healthcare systems that were inadequately prepared to address their needs. Women faced chronic health conditions common to GWV and voiced the desire to be understood as a cohort with unique needs. There is an ongoing need to expand services within the VA for women GWVs, particularly involving psychosocial support and management of chronic illness. While the small sample size can limit generalizability, the nature of these in-depth, minimally guided interviews provides a rich narrative of the women GWVs in this geographically diverse sample.


Subject(s)
Military Personnel , Persian Gulf Syndrome , Veterans , Male , Humans , Female , Gulf War , Military Personnel/psychology , Veterans/psychology , Delivery of Health Care , Mental Health , Persian Gulf Syndrome/epidemiology
6.
Med Care ; 60(9): 726-732, 2022 09 01.
Article in English | MEDLINE | ID: mdl-35880766

ABSTRACT

BACKGROUND: Health care systems have increasingly focused on patient engagement in efforts to improve patient-centered care. Appointment attendance is an integral component of patient engagement, and missed appointments are an ongoing problem for health care systems. Virtually no studies have examined how the sense of belonging is related to patient engagement within a health care system. OBJECTIVE: To examine patient experiences in the Veterans Health Administration (VA) with outpatient appointment attendance to identify factors that affect sense of belonging and patient engagement. RESEARCH DESIGN AND PARTICIPANTS: This study draws from qualitative data collected as part of a study to reduce missed appointments through use of enhanced appointment reminder letters. We conducted semistructured interviews with 27 VA patients with primary care or mental health clinic visits, using deductive and inductive analysis to develop themes. More than half of the participants were Vietnam veterans, 24 were over 40 years old, 21 were White, and 18 were men. RESULTS: We identified 3 factors that influence sense of belonging within the VA: (1) feelings of camaraderie and commitment toward other veterans were relevant to patient experience in the VA; (2) interactions with all staff influenced the engagement a patient felt with a particular clinic, care team, and the VA; (3) personalized communication and messaging could humanize the VA and demonstrate its interest in engaging with veterans. Lastly, we found (4) sense of belonging appeared to promote appointment attendance and patient engagement. CONCLUSIONS: There are multiple opportunities to strengthen patients' sense of belonging within the health care system that serves them. For veterans, strategies that build their sense of belonging may be a novel approach to increase appointment attendance and patient engagement in their health care.


Subject(s)
Appointments and Schedules , Veterans , Adult , Female , Humans , Male , Patient Participation , Qualitative Research , United States , United States Department of Veterans Affairs , Veterans Health
7.
Home Health Care Serv Q ; 41(4): 330-340, 2022.
Article in English | MEDLINE | ID: mdl-35348032

ABSTRACT

In the home care setting, boundaries may be difficult to identify when behavioral changes are made to accommodate the nature of care being delivered. In this secondary qualitative study, we examined how Home-based Primary Care (HBPC) clinicians understand role and relationship boundaries with patients and how these dynamics support patient care. The data set consisted of 14 semi-structured interviews with HBPC clinicians representing multiple disciplines and field observations of 6 HBPC team meetings. Using a directed approach to content analysis, we identified and described how HBPC clinicians worked to build relationships with patients, experienced challenges with emotional attachment, and negotiated boundaries in the patient-clinician relationship. Our findings illustrate how the home care setting is a site for which strong, therapeutic patient-clinician relationships can be developed while also highlighting the work that clinicians must do to balance addressing patient needs stemming from social isolation and adherence to their own professional boundaries.


Subject(s)
Home Care Services , Primary Health Care , Humans , Qualitative Research
8.
Cancer Nurs ; 45(2): E338-E344, 2022.
Article in English | MEDLINE | ID: mdl-34010215

ABSTRACT

BACKGROUND: Effective communication between physicians and nurses is crucial to the safety of patients, especially for those with cancer, which is a complex disease requiring multidisciplinary treatment. However, little is known about the factors that contribute to effective communication, which is defined as the development of shared understanding between two or more people. OBJECTIVE: This qualitative secondary analysis was conducted to identify factors that contribute to shared understanding between physicians and nurses from video-recorded conversations that occurred between them during inpatient rounds on oncology units. METHODS: We used inductive grounded theory to identify videos depicting moments of shared understanding. We then searched for preceding events to develop a preliminary conceptual model that described the factors contributing to shared understanding. RESULTS: Four factors emerged as contributors to shared understanding: engagement, clarification, confirmation, and resolution. These factors occurred in sequence with engagement occurring first and resolution occurring last, as the closure of a communication exchange. CONCLUSIONS: Existing interventions to improve communication include some of the factors identified as contributing to shared understanding (eg, closed-loop communications require clarification and confirmation). However, nurses may need to pay attention to all four factors to develop shared understanding that will promote effective communication with physicians and thereby enhance cancer care. IMPLICATIONS FOR PRACTICE: Nurses achieve effective communication when they are assertive and avoid indirect communication. A greater awareness of body language and positioning in relation to a physician at the start of a communication exchange may increase the effectiveness of nurse-physician communication.


Subject(s)
Inpatients , Physicians , Communication , Grounded Theory , Hospitalization , Humans , Qualitative Research
9.
J Am Med Inform Assoc ; 28(12): 2601-2607, 2021 11 25.
Article in English | MEDLINE | ID: mdl-34569593

ABSTRACT

OBJECTIVE: We examine how physicians and nurses use available communication technologies and identify the implications for communication and patient care based on the theory of workarounds. MATERIALS AND METHODS: We conducted a qualitative study at 4 U.S. hospitals during 2017. Researchers spent 2 weeks at each hospital conducting unit-based observation, shadowing, interviews, and focus groups with nurses and physicians. Using an iterative process, we inductively coded and thematically analyzed data to derive preliminary themes. The theory of workarounds provides an organizational lens on workarounds, consisting of 5 components: antecedents, types, effects, managerial stance, and organizational challenges of workarounds. The first 3 components of the theory helped us to organize and explain our findings. RESULTS: Communication technologies consisted of pagers and telephones. Antecedents to workarounds included one-way information flow, differential access related to differences in technology types, and technology mismatch. Types of workarounds included bypassing a variety of obstacles and substituting for unavailable resources. Direct effects of workarounds included pager fatigue, interruptions in patient care, and potential errors. DISCUSSION: One-way communication technologies created an environment where workarounds could flourish. By placing results within the context of the theory of workarounds, we extend what we know about why and how workarounds develop, and offer strategies to minimize workarounds' adverse effects. CONCLUSIONS: Through the theory of workarounds, we see that there is a trajectory to workarounds with potential consequences for clinicians and patients. Two-way communication technologies could minimize workarounds and gaps in information exchange, and reduce unnecessary interruptions and the potential for adverse events.


Subject(s)
Hospitals , Physicians , Communication , Humans , Information Technology , Qualitative Research
10.
HERD ; 14(4): 270-286, 2021 Oct.
Article in English | MEDLINE | ID: mdl-34169761

ABSTRACT

OBJECTIVE: To examine how physical layouts and space in ambulatory oncology practices influence patient safety and clinician communication. BACKGROUND: Ambulatory oncology practices face unique challenges in delivering safe care. With increasing patient volumes, these settings require additional attention to support patient safety and efficient clinical work processes. METHODS: This study used a mixed methods design with sequential data collection. Eight ambulatory oncology practices (of 29 participating practices) participated in both the quantitative and qualitative phases. In surveys, clinicians (n = 56) reported on safety organizing and communication satisfaction measures. Qualitative data included observations and semistructured interviews (n = 46) with insight into how physical layout influenced care delivery. Quantitative analysis of survey data included descriptive and correlational statistics. Qualitative analysis used inductive and thematic content analysis. Quantitative and qualitative data were integrated using side-by-side comparison tables for thematic analysis. RESULTS: Safety organizing performance was positively correlated with clinician communication satisfaction, r(54 df) = .414, p = .002. Qualitative analyses affirmed that the physical layout affected communication around chemotherapy infusion and ultimately patient safety. After data integration, safety organizing and clinician communication were represented by two themes: visibility of patients during infusion and the proximity of clinicians in the infusion center to clinicians in the clinic where providers see patients. CONCLUSIONS: Physical layouts of ambulatory oncology practices are an important factor to promote patient safety. Our findings inform efforts to construct new and modify existing infusion centers to enhance patient safety and clinician communication.


Subject(s)
Medical Oncology , Patient Safety , Ambulatory Care Facilities , Communication , Humans , Surveys and Questionnaires
11.
Bioorg Med Chem Lett ; 41: 127991, 2021 06 01.
Article in English | MEDLINE | ID: mdl-33775833

ABSTRACT

Analogs of diarylpyrrolinone lead compound 1 were prepared and tested for anti-proliferative activity in U-937 cancer cells. Alterations of 1 focused on modifying the two nitrogen atoms: a) the pyrrolinone nitrogen atom was substituted with a propyl group or replaced with an oxygen atom (furanone), and b) the substituents on the indole nitrogen were varied. These changes led to the discovery of a furanone analog 3b with sub-micromolar anti-cancer potency and tubulin polymerization inhibition activity.


Subject(s)
Antineoplastic Agents/pharmacology , Drug Discovery , Furans/pharmacology , Indoles/pharmacology , Tubulin Modulators/pharmacology , Tubulin/metabolism , Antineoplastic Agents/chemical synthesis , Antineoplastic Agents/chemistry , Cell Line, Tumor , Cell Proliferation/drug effects , Dose-Response Relationship, Drug , Drug Screening Assays, Antitumor , Furans/chemical synthesis , Furans/chemistry , Humans , Indoles/chemistry , Molecular Structure , Polymerization/drug effects , Structure-Activity Relationship , Tubulin Modulators/chemical synthesis , Tubulin Modulators/chemistry
12.
Cancer Nurs ; 44(5): E303-E310, 2021.
Article in English | MEDLINE | ID: mdl-32482956

ABSTRACT

BACKGROUND: Ambulatory oncology practices treat thousands of Americans on a daily basis with high-risk and high-cost antineoplastic agents. However, we know relatively little about these diverse practices and the organizational structures influencing care delivery. OBJECTIVE: The aim of this study was to examine clinician-reported factors within ambulatory oncology practices that affect care delivery processes and outcomes for patients and clinicians. METHODS: Survey data were collected in 2017 from 298 clinicians (nurses, physicians, nurse practitioners, and physician assistants) across 29 ambulatory practices in Michigan. Clinicians provided written comments about favorable and unfavorable aspects of their work environments that affected their ability to deliver high-quality care. We conducted inductive content analysis and used the Systems Engineering Initiative for Patient Safety work system model to organize and explain our findings. RESULTS: Clinicians reported factors within all 5 work-system components of the Systems Engineering Initiative for Patient Safety model that affected care delivery and outcomes. Common themes surfaced, such as unfavorable aspects including staffing inadequacy and high patient volume, limited physical space, electronic health record usability issues, and order entry. Frequent favorable aspects focused on the skills of colleagues, collaboration, and teamwork. Some clinicians explicitly reported how work system factors were relational and influenced patient, clinician, and organizational outcomes. CONCLUSIONS: These findings show how work-system components are interactive and relational reflecting the complex nature of care delivery. IMPLICATIONS FOR NURSING PRACTICE: Data obtained from frontline clinicians can support leaders in making organizational changes that are congruent with clinician observations of practices' strengths and opportunities for improvement.


Subject(s)
Ambulatory Care , Quality of Health Care , Ambulatory Care Facilities , Humans , Medical Oncology , Patient Safety , United States
13.
BMJ Qual Saf ; 30(9): 747-754, 2021 09.
Article in English | MEDLINE | ID: mdl-33168635

ABSTRACT

BACKGROUND: How quickly physicians respond to communications from bedside nurses is important for the delivery of safe inpatient care. Delays in physician responsiveness can impede care or contribute to patient harm. Understanding contributory factors to physician responsiveness can provide insights to promote timely physician response, possibly improving communication to ensure safe patient care. The purpose of this study was to describe the factors contributing to physician responsiveness to text or numeric pages, telephone calls and face-to-face messages delivered by nurses on adult general care units. METHODS: Using a qualitative design, we collected data through observation, shadowing, interviews and focus groups of bedside registered nurses and physicians who worked in four hospitals in the Midwest USA. We analysed the data using inductive content analysis. RESULTS: A total of 155 physicians and nurses participated. Eighty-six nurses and 32 physicians participated in focus groups or individual interviews; we shadowed 37 physicians and nurses across all sites. Two major inter-related themes emerged, message and non-message related factors. Message-related factors included the medium nurses used to convey messages, physician preference for notification via one communication medium over another and the clarity of the message, all of which could cause confusion and thus a delayed response. Non-message related factors included trust and interpersonal relationships, and different perspectives between nurses and physicians on the same clinical issue that affected perceptions of urgency, and contributed to delays in responsiveness. CONCLUSIONS: Physician responsiveness to communications from bedside nurses depends on a complex combination of factors related to the message itself and non-message related factors. How quickly physicians respond is a multifactorial phenomenon, and strategies to promote a timely response within the context of a given situation must be directed to both groups.


Subject(s)
Communication , Physicians , Adult , Focus Groups , Humans , Patient Care , Qualitative Research
14.
Oncol Nurs Forum ; 47(4): 417-427, 2020 07 01.
Article in English | MEDLINE | ID: mdl-32555555

ABSTRACT

PURPOSE: In oncology, chemotherapy treatment delays potentially jeopardize patient safety and impede progress toward disease remission. The purpose of this study was to examine the causes and consequences of chemotherapy treatment delays and possible solutions to improve quality of care. PARTICIPANTS & SETTING: The current authors selected a purposive sample of eight ambulatory oncology practices for ethnographic site visits, which lasted five days each. METHODOLOGIC APPROACH: The authors conducted 290 observation hours, including clinician shadowing, and 46 semistructured interviews with clinicians (oncology nurses, physicians, and advanced practice providers). Deductive and inductive thematic analysis was performed on all data. FINDINGS: The authors identified four primary themes from the analysis that affect delays. IMPLICATIONS FOR NURSING: Future investigations should examine nurses' communication practices in the context of timely chemotherapy administration because communication and documentation technologies within healthcare settings continuously evolve.


Subject(s)
Ambulatory Care Facilities/organization & administration , Ambulatory Care Facilities/statistics & numerical data , Drug Therapy/statistics & numerical data , Neoplasms/drug therapy , Oncology Nursing/organization & administration , Oncology Nursing/statistics & numerical data , Quality of Health Care/statistics & numerical data , Time-to-Treatment/statistics & numerical data , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Qualitative Research , United States
15.
J Gen Intern Med ; 35(3): 839-845, 2020 03.
Article in English | MEDLINE | ID: mdl-31832929

ABSTRACT

BACKGROUND: Poor communication between physicians and nurses is a significant contributor to adverse events for hospitalized patients. Overcoming communication difficulties requires examining communication practices to better understand some of the factors that affect the nurse-physician communication process. OBJECTIVE: To develop a more detailed understanding of communication practices between nurses and physicians on general care units. We focused on patient care rounds as an important activity in the care delivery process for communication. DESIGN: Qualitative study design PARTICIPANTS: A total of 163 physicians, registered nurses, and nurse practitioners who worked on pre-specified general care units in each of four hospitals in the Midwest. APPROACH: On each unit, data collection consisted of 2 weeks of observing and shadowing clinicians during rounds and at other times, as well as asking clinicians questions about rounds and communication during interviews and focus groups. A directed content analysis approach was used to code and analyze the data. KEY RESULTS: Workflow differences contributed to organizational complexity, affecting rounds and subsequently communication practices, both across and within provider types. Nurse and patient participation during rounds appeared to reduce interruptions and hence cognitive load for physicians and nurses. Physicians adopted certain behaviors within the social context to improve communication, such as socializing and building relationships with the nurses, which contributed to nurse participation in rounds. When rapport was lacking, some nurses felt uncomfortable joining physicians during rounds unless they were explicitly invited. CONCLUSIONS: Improving communication requires bringing attention to three contextual dimensions of communication: organizational complexity, cognitive load, and the social context. Initiatives that seek to improve communication may be more successful if they acknowledge the complexity of communication and the context in which it occurs.


Subject(s)
Physicians , Teaching Rounds , Communication , Humans , Patient Care , Patient Participation
16.
Bioorg Med Chem Lett ; 27(2): 191-195, 2017 01 15.
Article in English | MEDLINE | ID: mdl-27916489

ABSTRACT

Analogs containing a central 3-pyrrolin-2-one core with different methoxyphenyl and/or indole substituents were prepared and tested for anti-proliferative activity in U-937 cells. The most efficacious analogs were non-rigid, (non-fused) contained methoxyaryl groups located at the 4-position, and contained either methoxyaryl or indole groups located at the 3-position. Both the number of methoxy groups contained in the substituents and the particular location of the indole rings with respect to the lactam carbonyl had significant affects on anti-proliferative activity. This work provides a framework to better understand structure-activity relationships for inducing anti-proliferative activity in diaryl heterocyclic scaffolds.


Subject(s)
Antineoplastic Agents/pharmacology , Pyrrolidinones/pharmacology , Antineoplastic Agents/chemical synthesis , Antineoplastic Agents/chemistry , Cell Line, Tumor , Cyclization , Heterocyclic Compounds, 4 or More Rings/chemical synthesis , Heterocyclic Compounds, 4 or More Rings/chemistry , Heterocyclic Compounds, 4 or More Rings/pharmacology , Humans , Pyrrolidinones/chemical synthesis , Pyrrolidinones/chemistry , Structure-Activity Relationship
17.
J Org Chem ; 81(15): 6808-15, 2016 08 05.
Article in English | MEDLINE | ID: mdl-27391374

ABSTRACT

A simple and flexible approach to 3-pyrrolin-2-one fused carbazoles is disclosed. The key step involves the BF3-mediated electrophilic substitution of indoles with N-alkyl-substituted 3-aryltetramic acids, which provides access to indole-substituted 3-pyrrolin-2-ones. Scholl-type oxidative cyclizations of these materials led to the formation of the corresponding 3-pyrrolin-2-one-fused benzo[a]carbazoles and indolo[2,3-a]carbazoles. This work represents the first synthesis of the benzo[a]pyrrolo[3,4-c]carbazol-3(8H)-one ring system, while the indolo[2,3-a]pyrrolo[3,4-c]carbazol-5-one ring system is found in a number of biologically active compounds including the protein kinase C (PKC) inhibitor, staurosporine.

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