N-allyl-N-((2S,3R,6S)-3-allyl-6-((tert-butyldiphenylsilyloxy)-methyl)-3-hydroxy-3,6-dihydro-2H-pyran-2-yl)-4-methylbenzenesulfonamide 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
甲苯 为溶剂,
反应 1.0h,
以86%的产率得到(2S,4aR,9aS)-2-((tert-butyldiphenylsilyloxy)methyl)-9-tosyl-2,4a,5,8,9,9a-hexahydro-pyrano-[2,3-b]azepin-4a-ol