methyl 2,3-dideoxy-4-O-<3-(1-hydroxy-2-methoxy-3-phenyl-4-oxo-2-cyclobuten-1-yl)-2-propynyl>-6-O--α-D-erythro-hex-2-enopyranoside 以
甲苯 为溶剂,
反应 0.67h,
以63%的产率得到<2S-(2α,4β,4aβ,10bβ)>-1,2,4,4a,6,10b-hexahydro-2,9-dimethoxy-8-phenyl-4-<
oxy>pyrano<3,4-c><2>benzopyran-7,10-dione