(1R,5R,7R)-7-Methyl-3,4-dioxo-1,7-diphenyl-2-aza-bicyclo[3.2.0]heptane-5-carboxylic acid ethyl ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 、
三乙胺 作用下,
生成 3-Hydroxy-6-methyl-2-oxo-6,7-diphenyl-5,6-dihydro-2H-azepine-4-carboxylic acid ethyl ester 、 (1R,5R,7S)-7-Methyl-3,4-dioxo-1,7-diphenyl-2-aza-bicyclo[3.2.0]heptane-5-carboxylic acid ethyl ester