叔丁基二甲基氯硅烷 、 (2S,4R,5R,6R)-2-Benzyloxy-6-((R)-1,2-dihydroxy-ethyl)-4,5-dihydroxy-tetrahydro-pyran-2-carboxylic acid methyl ester 在
4-二甲氨基吡啶 作用下,
以
吡啶 为溶剂,
以78%的产率得到(2S,4R,5R,6R)-2-Benzyloxy-6-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-hydroxy-ethyl]-4,5-dihydroxy-tetrahydro-pyran-2-carboxylic acid methyl ester