5-[3-(2R-formyl-5-oxo-pyrrolidin-1-yl)-propyl]-thiophene-2-carboxylic acid methyl ester 、 7-{2R-[4-(3-methoxymethyl-phenyl)-3-oxo-but-1-enyl]-5-oxo-pyrrolidin-1-yl}-heptanoic acid ethyl ester 、
[3-(4-ethyl-phenyl)-2-oxo-propyl]-phosphonic acid diethyl ester 在
NaH 作用下,
以
乙酸乙酯 为溶剂,
生成 5-(3-{2R-[4-(4-ethyl-phenyl)-3-oxo-but-1-enyl]-5-oxo-pyrrolidin-1-yl}-propyl)-thiophene-2-carboxylic acid methyl ester