ABSTRACT
@#To optimize the process of hydrogenation reduction in the synthesis of apremilast (APST), 3-nitrophthalic anhydride (4) and (S)-1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl) ethanamine-(S)-2-acetamido-4-methylpentanoate (7) were used as starting materials to synthesize (S)-2-(1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)-4-nitroisoindoline-1,3-dione (8) by amination.Then compound 8 was reduced to (S)-4-amino-2-(1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl) ethyl) isoindoline-1,3-dione (9) with ammonium formate as hydrogen source and palladium hydroxide as catalyst.Finally, apremilast was obtained by the acetylation reaction with acetic anhydride.The structure of the products were verified by optical rotation, 1H NMR, 13C NMR, MS and elemental analysis.And the total yield of three steps was increased to 67.0%.The improved reduction process can avoid the special reaction of hydrogenation and pressurization, and reduce the safety risk and production costs with high commercial value.
ABSTRACT
Objective To propose a method to improve the efficiency and accuracy of the Pinnacle treatment planning system in searching for a certain patient. Methods The original Pinnacle system was modified by adding a button of"Search Patient" in the window of"Patient Select" to call a self-built window of"Search Patient by MRN or Name". After inputting the patient′s Medical Record Number or Name, a self-built script file was called to quickly find and locate the patient′s record. Results The patient′s MRN or Name was input in the window of"Search Patient by MRN or Name",and then input"Enter" or clicked the button of Search to rapidly identify the patient and enhance the search efficiency. Conclusion The openness and script of the Pinnacle system can be utilized to modify and improve and supplement the existing func-tions.
ABSTRACT
OBJECTIVE To develop a rapid method for simultaneously identifying Staphylococcus aureus(SA) and its resistance against meticillin. METHODS The target strains authenicated to Staphylococcus by traditional methods(appearance,Gram-stain,catalase) first,then using Slidex~staph.plus to authenticate SA;establishing traditional method or coagulase test and ATB-ID32STAPH system for verification.The penicillin-binding protein 2a(PBP2a) was examined by Slidex MRSA Detection,establishing resistance oxacillin sieving test and mecA gene was examined by PCR for verification. RESULTS The 135 strains were positive and 321 strains were negative for Slidex~staph.plus from 456 strains.The 127 S.aureus strains and eight others were confirmed from 135 positive strains finally,11 SA strains and 310 other strains were confirmed from 321 negative strains,there were 92.0% for sensitivity and 97.5% for specificity in this method.The 52 strains PBP2a positively confirmed to meticillin-resistant S.aureus(MRSA) using Slidex MRSA Detection and 57 MRSA strains were confirmed using resistance oxacillin sieving test or PCR from 138 strains.There were 91.2% for sensitivity and 100% for specifity in this method. CONCLUSIONS The duplex Slidex~-staph monoclonal antibody examinated to SA and confirmed to MRSA has higher sensitivity and specificity.