2-{2-[1-Methoxycarbonyl-meth-(E)-ylidene]-5-oxo-pyrrolidin-1-yl}-4,5,6,7-tetrahydro-2H-isoindole-1-carboxylic acid methyl ester 在
间戊二烯 作用下,
以
2-甲基-2-丁醇 为溶剂,
生成
3-{Methoxycarbonyl-[5-oxo-pyrrolidin-(2Z)-ylidene]-methyl}-4,5,6,7-tetrahydro-2H-isoindole-1-carboxylic acid methyl ester 、 methyl 3-[(1Z)-2-methoxy-2-oxo-1-(5-oxopyrrolidin-2-ylidene)ethyl]-4,5,6,7-tetrahydro-2H-isoindole-1-carboxylate 、 、 methyl 2-[(1E)-2-methoxy-2-oxo-1-(5-oxopyrrolidin-2-ylidene)ethyl]-4,5,6,7-tetrahydroisoindole-1-carboxylate