(2S,4R)-4-[[(4-溴-1,3-二氢-2H-异吲哚-2-基)羰基]氧基]-1,2-吡咯烷二羧酸 1-叔丁酯 2-甲酯 、
N-cyclohexylcyclohexanamine;(2S)-2-(2,2-dimethylhex-5-enoxycarbonylamino)-3,3-dimethylbutanoic acid 在
N-cyclohexylcyclohexanamine;(2S)-2-(2,2-dimethylhex-5-enoxycarbonylamino)-3,3-dimethylbutanoic acid 作用下,
以96的产率得到(2S)-2-[[6-[2-[(3R,5S)-5-methoxycarbonyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidin-3-yl]oxycarbonyl-1,3-dihydroisoindol-4-yl]-2,2-dimethylhexoxy]carbonylamino]-3,3-dimethylbutanoic acid