(4R,5S)-4-(tert-butyldimethylsilyloxy)-3,3,5-trimethylpyrrolidin-2-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 pale-yellow oil (yield: 391.7 mg, yield: 89%)的产率得到4-[(4R,5S)-4-(tert-butyldimethylsilyloxy)-3,3,5-trimethyl-2-oxopyrrolidin-1-yl]-2-(trifluoromethyl)benzonitrile