溴甲苯 、 (2R,5S)-2-<2-(diethoxyphosphoryl)ethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxypyrazine 在
叔丁基锂 作用下,
生成 (2S,5S)-2-benzyl-2-<2-(diethoxyphosphoryl)ethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxypyrazine 、
(2S,5S)-2-benzyl-2-<2-(diethoxyphosphoryl)ethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxypyrazine