(6S)-7-(tert-butyldimethylsilyloxy)-6-methyl-5-azaspiro[2.4]heptan-4-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 (yield: 68.4 mg, yield: 22.2%) and 4-[(6S,7R)-7-(tert-butyldimethylsilyloxy)-6-methyl-4-oxo-5-azaspiro[2.4]hept-5-yl]-2-chlorobenzonitrile (yield: 161 mg, yield: 52.4%) were obtained each as a colorless solid的产率得到4-[(6S,7S)-7-(tert-butyldimethylsilyloxy)-6-methyl-4-oxo-5-azaspiro[2.4]hept-5-yl]-2-chlorobenzonitrile