[(4aR,8S,8aR)-2-phenyl-4,4a,8,8a-tetrahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy-tert-butyl-dimethylsilane 、 dibenzyl azodicarboxylate 以
二氯甲烷 、
环己烷 为溶剂,
以70%的产率得到<4aS-(4aα,5aα,8α,9aβ,10α,10aα)>-10-<<(1,1-Dimethylethyl)dimethylsilyl>oxy>-4a,5a,6,9a,10,10a-hexahydro-8-phenyl-3-(phenylmethoxy)-1H-<1,3>dioxino<4',5':5,6>pyrano<3,2-e><1,3,4>oxadiazine-1-carboxylic acid phenylmethyl ester