Synthesis of a benzodiazepine analogous sydnotriazepine
Starting from 3-benzylamino-4-benzoylsydnone (1) acylation to N-acetyl (2a), N-chloroacetyl (2b) and N-bromoacetyl (2c) derivatives was successful. Treatment of 2b or 2c with liquid ammonia resulted in cleavage of the N-acyl group to give syndnone imine 3