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