右旋香芹酮 、 lithium;(2S)-3,6-dimethoxy-2-propan-2-yl-2H-pyrazin-1-ide 在
copper(I) bromide dimethylsulfide complex 、
二甲基硫 作用下,
生成 (2R,3S,5S)-5-Isopropenyl-3-((2S,5S)-5-isopropyl-3,6-dimethoxy-2,5-dihydro-pyrazin-2-yl)-2-methyl-cyclohexanone 、 (2R,3S,5S)-5-Isopropenyl-3-((2S,5S)-5-isopropyl-3,6-dimethoxy-2,5-dihydro-pyrazin-2-yl)-2-methyl-cyclohexanone 、
(2R,3S,5S)-5-Isopropenyl-3-((2S,5S)-5-isopropyl-3,6-dimethoxy-2,5-dihydro-pyrazin-2-yl)-2-methyl-cyclohexanone 、 (2R,3S,5S)-5-Isopropenyl-3-((2S,5S)-5-isopropyl-3,6-dimethoxy-2,5-dihydro-pyrazin-2-yl)-2-methyl-cyclohexanone