methyl 2,3,6-tri-O-benzyl-4-deoxy-4-(iodomethyl)-α-D-glucopyranoside   、                                                                                      
(2R,3S,4S,5R)-2,3,4,6-Tetrakis-benzyloxy-5-(tert-butyl-dimethyl-silanyloxy)-hexanal                                                                                                                                                              在
                                                                                                                                                                                 
正丁基锂                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以52%的产率得到(3S,4R,5S,6R)-3,4,5,7-Tetrakis-benzyloxy-1-((2S,3R,4S,5R,6S)-4,5-bis-benzyloxy-2-benzyloxymethyl-6-methoxy-tetrahydro-pyran-3-yl)-6-(tert-butyl-dimethyl-silanyloxy)-heptan-2-ol