tert-butyl N-allyl-N-[(2R,4aR,6S,7R,8R,8aS)-6-methoxy-2-phenyl-7-vinylhexahydropyrano[3,2-d][1,3]dioxin-8-yl]carbamate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
二氯甲烷 为溶剂,
以92%的产率得到9-methoxy-3-phenyl-1,4a,4b,8a,9,10a-hexahydro-6H-2,4,10-trioxa-5-azaphenanthrene-5-carboxylic acid tert-butyl ester