allyl 3-(allyl(tert-butoxycarbonyl)amino)-3-(6-methoxy-2,2-dimethyltetrahydrofuro [2,3d][1,3]dioxol-5-yl)propanoate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
甲苯 为溶剂,
反应 20.0h,
以65%的产率得到tert-butyl (S,Z)-4-((3aR,5R,6S,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl)-2-oxo-3,4,6,9-tetrahydro-1,5-oxazonine-5(2H)-carboxylate