Acetic acid (2R,3S,4R)-6-acetoxy-4-dimethylamino-2-methyl-tetrahydro-pyran-3-yl ester 、
2,2-Dimethyl-propionic acid (S)-3-hydroxy-2-(toluene-4-sulfonyloxy)-propyl ester 在
molecular sieve 、
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
生成 2,2-Dimethyl-propionic acid (S)-3-((2R,4R,5S,6R)-5-acetoxy-4-dimethylamino-6-methyl-tetrahydro-pyran-2-yloxy)-2-(toluene-4-sulfonyloxy)-propyl ester 、 2,2-Dimethyl-propionic acid (S)-3-((2S,4R,5S,6R)-5-acetoxy-4-dimethylamino-6-methyl-tetrahydro-pyran-2-yloxy)-2-(toluene-4-sulfonyloxy)-propyl ester