甲基2,3,4-三-O-苄基-α-D-吡喃葡萄糖苷 、
methyl (2S,4S,5R,6R)-5-acetamido-4-acetyloxy-2-methylsulfanyl-6-[(1R,2S)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate 在
4 A molecular sieve 、
苯基硒基三氟甲烷磺酸酯 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 0.5h,
生成 (2S,4S,5R,6R)-4-Acetoxy-5-acetylamino-6-((1R,2S)-1,2,3-triacetoxy-propyl)-2-((2R,3R,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-2-carboxylic acid methyl ester 、 (2R,4S,5R,6R)-4-Acetoxy-5-acetylamino-6-((1R,2S)-1,2,3-triacetoxy-propyl)-2-((2R,3R,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-2-carboxylic acid methyl ester