(6S)-7-(tert-butyldimethylsilyloxy)-6-ethyl-5-azaspiro[2.4]heptan-4-one 、
2-氰基-5-碘三氟甲苯 、
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: 433.7 mg, yield: 67%)的产率得到4-[(6S,7R)-7-(tert-butyldimethylsilyloxy)-6-ethyl-4-oxo-5-azaspiro[2.4]hept-5-yl]-2-(trifluoromethyl)benzonitrile