氯甲酸-9-芴基甲酯 、
dimethyl(thexyl)silyl 4,6-O-benzylidene-2-deoxy-2-(dimethylmaleimido)-β-D-glucopyranoside 在
4-二甲氨基吡啶 作用下,
以
吡啶 为溶剂,
以93%的产率得到Carbonic acid (2R,4aR,6S,7R,8R,8aS)-7-(3,4-dimethyl-2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-6-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl ester 9H-fluoren-9-ylmethyl ester