丙酮酸甲酯 、
Benzoic acid (2S,3R,4S,5R,6R)-2-benzyloxy-5-hydroxy-6-hydroxymethyl-4-methoxy-tetrahydro-pyran-3-yl ester 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
生成 (2R,4aR,6S,7R,8S,8aR)-7-Benzoyloxy-6-benzyloxy-8-methoxy-2-methyl-hexahydro-pyrano[3,2-d][1,3]dioxine-2-carboxylic acid methyl ester 、 benzyl 2-O-benzoyl-4,6-O-<(S)-1-methoxycarbonylethylidene>-3-O-methyl-α-D-glucopyranoside