5-(tert-butyldimethylsilyloxy)-2,3-isopropylidenedioxy-D-ribofuranose 、
2S-N-(4-nitrobenzoyl)-4-triphenylphosphoranylidene-glutamic acid α-methyl-γ-ethyl ester 以
甲苯 为溶剂,
反应 24.0h,
以25%的产率得到(S)-2-[(3aS,4S,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-4-(4-nitro-benzoylamino)-pentanedioic acid 1-ethyl ester 5-methyl ester