三氯乙腈 、
(2R,3S,4S,5R,6R)-3,4,5-Triacetoxy-6-((2R,3S,4R,5R,6R)-2-acetoxymethyl-5-azido-4-benzyloxy-6-hydroxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-2-carboxylic acid methyl ester 在
potassium carbonate 作用下,
以
二氯甲烷 为溶剂,
以77%的产率得到(2R,3S,4S,5R,6R)-3,4,5-Triacetoxy-6-[(2R,3S,4R,5R,6S)-2-acetoxymethyl-5-azido-4-benzyloxy-6-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-3-yloxy]-tetrahydro-pyran-2-carboxylic acid methyl ester