methyl 1-(2-(2-methoxy-2-oxoethylidene)-5-oxopyrrolidin-1-yl)-1H-pyrrole-2-carboxylate 在
间戊二烯 作用下,
以
2-甲基-2-丁醇 为溶剂,
生成 、 methyl 5-[(1Z)-2-methoxy-2-oxo-1-(5-oxopyrrolidin-2-ylidene)ethyl]-1H-pyrrole-2-carboxylate 、 5-[1-Methoxycarbonyl-meth-(Z)-ylidene]-2-oxo-2,3,4,5-tetrahydro-1'H-[1,2']bipyrrolyl-5'-carboxylic acid methyl ester 、 methyl 5-[(2E)-2-(2-methoxy-2-oxoethylidene)-5-oxopyrrolidin-1-yl]-1H-pyrrole-2-carboxylate