2,2-二甲氧基丙烷 、 3-[(2R,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-tetrahydro-pyran-2-yl]-2,3-dihydroxy-propionic acid methyl ester 在
camphor-10-sulfonic acid 作用下,
以
二氯甲烷 为溶剂,
以46%的产率得到(4S,5R)-5-[(2R,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-tetrahydro-pyran-2-yl]-2,2-dimethyl-[1,3]dioxolane-4-carboxylic acid methyl ester