(2R)-2-[(4R,5S)-5-ethenyl-2,2-dimethyl-1,3-dioxolan-4-yl]-1-methylethyl (2R,3R)-3-ethenyloxirane-2-carboxylate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
苯 为溶剂,
反应 2.0h,
以65%的产率得到(1aR,4R,5aR,8aS,9E,10aR)-1a,4,5,5a,8a,10a-hexahydro-4,7,7-trimethyl-2H-[1,3]dioxolo[4,5-g]oxireno[c]oxecin-2-one