SYNTHETIC STUDIES OF LIPOSIDOMYCIN DEGRADATION PRODUCT: MODEL STUDIES OF DIAZEPANONE RING CONSTRUCTION

摘要

The model studies of diazepanone ring construction of liposidomycin degradation product was described. A synthesis of the liposidomycin diazepanone ring system using 2-nitrobenzenesulfonamides (N-Ns) as an activating and a protecting group has been achieved. Under the intramolecular Mitsunobu reaction conditions, the cyclization reaction proceeded efficiently to give seven-membered ring systems.