(2S,3S)-3-(tert-butyldimethylsilyloxy)-2-ethylpyrrolidin-5-one 、
4-溴-2-氯苯甲腈 、
Dicaesio carbonate 、
4,5-双二苯基膦-9,9-二甲基氧杂蒽 在
(1E,4E)-1,5-diphenylpenta-1,4-dien-3-one;palladium 作用下,
以in the same manner as in Reference Example 3, the title compound was obtained as a colorless solid (yield: 550 mg, 75%)的产率得到4-[(2S,3S)-3-(tert-butyldimethylsilyloxy)-2-ethyl-5-oxopyrrolidin-1-yl]-2-chlorobenzonitrile