重氮甲烷 、
methyl (1R,4S,5S,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]bicyclo[4.1.0]hept-2-ene-3-carboxylate 以
乙醚 为溶剂,
以99%的产率得到methyl (3aR,4S,5S,5aR,6aR,6bS)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-4,5,5a,6,6a,6b-hexahydro-1H-cyclopropa[e]indazole-3a-carboxylate