Intramolecular carbonylative cyclization of either or -9-methoxy-2-nonen-7-ynyl bromide promoted by Ni(CO)4 afforded the same isomer of 4-(methoxycarbonylmethyl)-2-(methoxymethyl)bicyclo [3.3.0]oct-1-en-3-one in 43–50% yields with a relative -configuration of H-4 and H-5 protons.
Ni(CO)4促进的或--9-甲氧基-
2-壬烯-7-炔基
溴的分子内羰基环化提供了4-(甲氧基羰基甲基)-2-(甲氧基甲基)双环[3.3.0] oct-的相同异构体H-4和H-5质子具有相对构型,1-en-3-one的产率为43-50%。