Phenyl 6-O-benzyl-2,3-di-O-methyl-1-thio-α-D-glucopyranoside 、 2,6-Di-O-benzyl-4-O-levulinyl-3-O-methyl-α-D-glucopyranosyl-(1->4)-2-O-acetyl-6-O-benzyl-3-O-methyl-D-glucopyranose trichloroacetimidate 在
4 A molecular sieve 、
叔丁基二甲硅基三氟甲磺酸酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.17h,
以68%的产率得到4-oxo-pentanoic acid 6-[5-acetoxy-2-benzyloxymethyl-6-(2-benzyloxymethyl-4,5-dimethoxy-6-phenylsulfanyl-tetrahydro-pyran-3-yloxy)-4-methoxy-tetrahydro-pyran-3-yloxy]-5-benzyloxy-2-benzyloxymethyl-4-methoxy-tetrahydro-pyran-3-yl ester