(2R,5S)-2-<2-(diethoxyphosphoryl)ethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxypyrazine 、
3-溴丙炔 在
叔丁基锂 作用下,
生成
(2R,5S)-2-<2-(diethoxyphosphoryl)ethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxy-2-(2-propinyl)pyrazine 、 (2R,5S)-2-<2-(diethoxyphosphoryl)ethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxy-2-(2-propinyl)pyrazine