N-[(4aR,6S,8R,8aS)-8-ethenyl-6-methoxy-2-phenyl-4a,6,7,8a-tetrahydro-4H-pyrano[3,2-d][1,3]dioxin-8-yl]-2,2,2-trichloroacetamide 在
臭氧 作用下,
以67%的产率得到N-[(4aR,6S,8S,8aS)-8-formyl-6-methoxy-2-phenyl-4a,6,7,8a-tetrahydro-4H-pyrano[3,2-d][1,3]dioxin-8-yl]-2,2,2-trichloroacetamide