Trifluoro-methanesulfonic acid (4S,6S)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2,2-dimethyl-[1,3]dioxan-4-ylmethyl ester 、
(S)-[(4R,6S)-2,2-dimethyl-6-(phenylmethoxymethyl)-1,3-dioxan-4-yl]-(1,3-dithian-2-yl)methanol 在
六甲基磷酰三胺 、
正丁基锂 作用下,
以
四氢呋喃 为溶剂,
以50%的产率得到(S)-[2-[[(4S,6S)-6-[2-[tert-butyl(diphenyl)silyl]oxyethyl]-2,2-dimethyl-1,3-dioxan-4-yl]methyl]-1,3-dithian-2-yl]-[(4R,6S)-2,2-dimethyl-6-(phenylmethoxymethyl)-1,3-dioxan-4-yl]methanol