tert-Butyl (E)-8-(2-methoxycarbonylethyl)-7-methoxycarbonylmethyl-3,3-dimethyl-1-oxo-5-(p-tolylsulfonylaminomethyl)-1,2,3,10-tetrahydropyrrin-9-carboxylate 在
N,N'-二甲基乙二胺 作用下,
以
various solvent(s) 为溶剂,
以80%的产率得到5-<4-(2-methoxycarbonylethyl)-3-methoxycarbonylmethyl-5-t-butoxycarbonylpyrrol-2-ylmethylene>-4,4-dimethylpyrrolidin-2-one