4-溴-2-甲氧基苯腈 、
(4R,5S)-3,3-difluoro-4-hydroxy-5-methylpyrrolidin-2-one 、
4,5-双二苯基膦-9,9-二甲基氧杂蒽 、
Dicaesio carbonate 在
(1E,4E)-1,5-diphenylpenta-1,4-dien-3-one;palladium 作用下,
以in the same manner as in Reference Example 18, the title compound was obtained as a colorless solid (yield: 201 mg, 7%)的产率得到2-methoxy-4-[(4R,5S)-3,3-difluoro-4-hydroxy-5-methyl-2-oxopyrrolidin-1-yl]benzonitrile