Synthesis and immunotropic properties of 5-substituted 1,5-benzodiazepin-2-ones derivatives in cultures of human peripheral blood cells, Part III.

The reaction of 4-methyl-(A) and 3-methyl-1H-2,3,4,5-tetrahydro-1,5-benzodiazepin-2-one (B) with selected alpha,beta-unsaturated acid chlorides: crotonoyl, cinnamoyl, and 4-nitrocinnamoyl is described. We have also characterized immunotropic activities of these compounds in the proliferative response of human lymphocytes to phytohemagglutinin A (PHA) or to allogeneic cells in one-way mixed lymphocyte reaction (MLR), as well as their action on tumor necrosis factor alpha (TNF-alpha) and interleukin 6 (IL-6) production in peripheral blood mononuclear cells (PBMC) and mixed lymphocyte cultures (MLC). Some of the compounds exhibited regulatory activities in the proliferative response of cells to PHA depending on the reactivity of cells to PHA. The MLR induced proliferation of lymphocytes was moderately inhibited by two selected compounds. The compounds showed also inhibitor properties with regard to lipopolysaccharide (LPS)- and MLR-induced TNF-alpha production. Structure-activity relationship was discussed.

Synthesis and antiproliferative activity in vitro of novel 1,5-benzodiazepines. Part II.

The reaction of 2,2,4-trimethyl-1H-2,3-dihydro-1,5-benzodiazepine (1) with cinnamoyl chloride leading to the formation of 1-cinnamoyl derivative 2 is described. Two novel benzodiazepines, 2,2,4-trimethyl-1H-2,3,4,5-tetrahydro-1,5-benzodiazepine (3) and 1-cinnamoyl-2,2,4-trimethyl-1H-2,3,4,5-tetrahydro-1,5-benzodiazepine (4), were synthesized by the reduction of 1 and 2 using NaBH4 in i-PrOH and two other derivatives 5 and 6 were obtained by reaction of 4 with equimolar and dimolar quantity of cinnamoyl chloride, respectively. The structures of 1-6 were confirmed by analytical and spectral data (IR, 1H NMR, and MS). 7-Carboxy-2,2,4-trimethyl-1H-2,3-dihydro-1,5-benzodiazepine (7) was synthesized and its crystals were subjected to X-ray analysis. Benzodiazepines 1-6 were evaluated for antiproliferative activity in vitro. Among the compounds tested, 4-6 exhibited cytotoxic activity against human cancer cell lines, namely SW707 (colon cancer), MCF-7 (breast cancer), A549 (lung cancer), and HCV29T (bladder cancer).

Synthesis of new derivatives of 4-methyl-5-ethoxalyl-1H-2,3,4,5- tetrahydro-1,5-benzodiazepin-2-one and their psychotropic and anti-proliferative activities.

5-Ethoxalyl-4-methyl-1H-2,3,4,5-tetrahydro-1,5-benzodiazepin -2-one [I] was treated with some selected secondary amines (dimethyl-, diethyl-, dipropyl-, disobutylamine or with morpholine) and methyl-hydrazine. Amides II-IV and hydrazide VII were obtained. Compounds II, IV and VI were tested for their psychotropic activity; they showed a weak toxicity. Compounds II and VI showed an anxiolytic activity. Compounds I, II, IV, VI and VII were screened for their cytotoxic (anti-proliferative) activity in vitro by using different human cancer cell lines. None of them revealed any inhibiting effect against the tumor lines used.