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