Toluene-4-sulfonic acid 2-[(S)-2-((1S,2S)-3-benzyloxy-2-hydroxy-1-trityloxymethyl-propoxy)-1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethoxy]-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 sodium hydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (2S,3S,6S,11S,12S,15S)-2,11-Bis-benzyloxymethyl-6,15-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-3,12-bis-trityloxymethyl-1,4,7,10,13,16-hexaoxa-cyclooctadecane