(S)-1-[(S)-2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-4,4-diethoxy-butyryl]-2,3-dihydro-1H-indole-2-carboxylic acid ethyl ester 在
PPA 作用下,
反应 0.5h,
以84%的产率得到(2S,5S)-5-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-4-oxo-1,2,4,5-tetrahydro-azepino[3,2,1-hi]indole-2-carboxylic acid ethyl ester