(+)-pinanediol (1S)-1-aminohept-6-ene-1-boronate hydrochloride 、
1-(3-allyloxy-2-tert-butoxycarbonylaminopropionyl)-2-carboxy-4-(1,3-dihydroisoindolinyl-2-carboxy)pyrrolidine 在
N-甲基吗啉 、
氯甲酸异丁酯 作用下,
以
四氢呋喃 为溶剂,
以41%的产率得到[(3R,5S)-1-[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-prop-2-enoxypropanoyl]-5-[[(1S)-1-(2,9,9-trimethyl-3,5-dioxa-4-boratricyclo[6.1.1.02,6]decan-4-yl)hept-6-enyl]carbamoyl]pyrrolidin-3-yl] 1,3-dihydroisoindole-2-carboxylate