FACILE SYNTHESIS OF 1,4-BENZODIAZEPIN-5-ONE DERIVATIVES VIA INTRAMOLECULAR AZA-WITTIG REACTION - APPLICATION TO AN EFFICIENT SYNTHESIS OF O-BENZYL DC-81
S. Eguchi et al., FACILE SYNTHESIS OF 1,4-BENZODIAZEPIN-5-ONE DERIVATIVES VIA INTRAMOLECULAR AZA-WITTIG REACTION - APPLICATION TO AN EFFICIENT SYNTHESIS OF O-BENZYL DC-81, Journal of organic chemistry, 60(13), 1995, pp. 4006-4012
The tandem Staudinger/aza-Wittig reaction of N-(o-azidobenzoyl)-alpha-
amino acid esters gave the corresponding 1,4-benzodiazepin-5-one deriv
atives in moderate to good yields. This method was applied successfull
y to a new efficient synthesis of BzlDC-81.