Synthesis of Some New Benzo[b][1,4]diazepine Based Heterocycles

Highly efficient, catalyst-free, one-pot, pseudo-seven-component synthesis of novel poly-substituted pyrazolyl-1,2-diazepine derivatives

A novel, green and high yielding preparation of poly-substituted pyrazolyl-1,2-diazepine derivatives is describedviaa one-pot pseudo-seven-component condensation reaction under catalyst-free conditions in EtOH at room temperature.

Crystal structure of (1Z,4Z)-2,4-dimethyl-3H-benzo[b][1,4]diazepine

The title compound, C11H12N2, is not planar due to the folding of the seven-membered ring. In the crystal, molecules are packed opposite each other to minimize the electronic repulsion but the long intermolecular distances indicate that no directional contacts are found.

Microwave-assisted synthesis of novel 2H-chromene derivatives bearing phenylthiazolidinones and their biological activity assessment

6-Hydroxy-2-oxo-2H-chromene-4-carbaldehyde (2), 6-chloro-2-oxo-2H-chromene-4-carbaldehyde (3) and 6-hydrazinyl-4-methyl-2H-chromen-2-one (5) were prepared as single-pharmacophore motif key intermediates. Compounds 2, 3 and 5 were incorporated in a series of multicomponent reactions (MCRs), under microwave assistance as well as conventional chemical synthesis processes, to afford a series of three and/or four-pharmacophoric-motif conjugates 8a,b, 11, 13, 16, 17, 19 and 20 in good yields. The newly synthesized compounds were characterized by IR, NMR, 13C-NMR, MS and elemental analyses. Finally the synthesized compounds have been screened for their biological activity whereupon they exhibited remarkable antimicrobial activity on different classes of bacteria and the fungus.