A new entry to pyrazolo[4,3‐e][1,4]diazepines. Facile synthesis of pyrazolo [4,3‐e][1,4]diazepin‐5,8‐diones, 5,6,8‐triones and pyrazolo[4,3‐e]pyrrolo‐[1,2‐a][1,4]diazepin‐5,10‐diones

A facile approach to pyrazolo[4,3-e][1,4]diazepin-5,8-diones and pyrazolo[4,3-e]pyrrolo[1,2-a][1,4]-diazepin-5,10-diones is reported. Strategy involved the utility of α-amino acid as a three-atom segment in the construction of diazepine skeleton on the preformed pyrazole ring.