(3E,5R)-1-[2-[(2R,3S,4S,5S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-3,5-dimethyl-6-[(3S)-3-methylpent-4-enyl]oxan-2-yl]-3,4,6-trimethoxy-5-methylphenyl]-3,5,7-trimethylocta-3,7-dien-2-one 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
甲苯 为溶剂,
反应 120.0h,
以53%的产率得到(1R,10E,12R,14Z,16S,19R,20S,21S,22S)-21-[tert-butyl(dimethyl)silyl]oxy-3,4,6-trimethoxy-5,10,12,14,16,20,22-heptamethyl-23-oxatricyclo[17.3.1.02,7]tricosa-2(7),3,5,10,14-pentaen-9-one