(+)-(1R,2R,4S,5R,6R)-6-exo-{(S)-[(tert-butyl)dimethylsilyloxy][(3aR,4aR,7aR,7bS)-3a,4a,7a,7b-tetrahydro-6,6-dimethyl[1,3]dioxolo[4,5]furo[2,3-d]isoxazol-3-yl]methyl}-5-endo-(methoxymethoxy)-3-oxo-7-oxabicyclo[2.2.1]hept-2-exo-yl 4-bromobenzenesulfonate 在
碳酸氢钠 、
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
反应 20.0h,
以532 mg的产率得到(+)-(1R,4R,5S,6S,7R)-4-exo-{[(4-bromophenyl)sulfonyl]oxy}-6-exo-{(S)-[(tert-butyl)dimethylsilyloxy][(3aR,4aR,7aR,7bS)-3a,4a,7a,7b-tetrahydro-6,6-dimethyl[1,3]dioxolo[4,5]furo[2,3-d]isoxazol-3-yl]methyl}-7-endo-(methoxymethoxy)-2,7-dioxabicyclo[3.2.1]...