methyl (methyl 2,3-di-O-benzoyl-α-D-galactopyranosid)uronate 、
2,3-bis-O-(4-methoxyphenylmethyl)-4,6-O-(4-methoxyphenylmethylidene)-α-D-galactopyranosyl trichloroacetimidate 在
4 A molecular sieve 、
三乙基硅基三氟甲磺酸酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.08h,
以73%的产率得到methyl {methyl 2,3-di-O-benzoyl-4-O-[2',3'-bis-O-(4-methoxyphenylmethyl)-4',6'-O-(methoxyphenylmethylidene)-α-D-galactopyranosyl]-α-D-galactopyranosid}uronate