N-[2-(3,4-dimethoxyphenyl)ethyl]-N-(1,1-dimethyl-3-thiophen-2-ylprop-2-ynyl)malonamic acid ethyl ester 在
caesium carbonate 作用下,
以
N-甲基吡咯烷酮 为溶剂,
反应 2.0h,
以60%的产率得到1-[2-(3,4-dimethoxyphenyl)ethyl]-5,5-dimethyl-2-oxo-4-thiophen-2-ylmethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid ethyl ester