(1S,2R,3E)-4-[(1S,2R)-2-hydroxy-1-methyl-3-butenyloxy]-2-(methoxyethoxy)methoxy-1-methyl-3-butenyl (S)-3-acryloylamino-butenoate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
二氯甲烷 为溶剂,
以78%的产率得到(3S,6E,8R,9S,12E,14R,15S)-8-hydroxy-14-(2-methoxyethoxy)methoxy-3,9,15-trimethyl-4-aza-10,16-dioxa-6,12-cyclohexadecadiene-1,5,11-trione