4-Amino-2-cyanopyrimidines: Novel scaffold for nonpeptidic cathepsin S inhibitors

Microwave-assisted synthesis and antibacterial evaluation of new derivatives of 1,2-dihydro-3H-pyrazolo[3,4-d]pyrimidin-3-one

Synthesis of new 1,2-dihydro-3H-pyrazolo[3,4-d] pyrimidin-3-ones4–6starting with ethyl 4-hydroxy-2-methylthio-pyrimidine-5-carboxylate (1) under classical heating and microwave-induced conditions is reported. The antibacterial activities of the synthesized compounds were evaluated using chloramphenicol and streptomycin as reference drugs.

Azepanone-based inhibitors of human cathepsin S: optimization of selectivity via the P2 substituent

A series of azepanone inhibitors of cathepsin S is described. Selectivity over both cathepsin K and cathepsin L was achieved by varying the P2 substituent. Ultimately, a balanced potency and selectivity profile was achieved in compound 39 possessing a 1-methylcyclohexyl alanine at P2 and nicotinamide as the P' substituent. The cellular potency of selected analogs is also described.