三乙基氯硅烷   、                                                                                      
(1S,3S,7R,11S,15S,17R,21R,23S,25S,E)-17-((R)-1-((benzyloxy)methoxy)ethyl)-21-((tert-butyldiphenylsilyl)oxy)-25-hydroxy-11-methoxy-10,10,26,26-tetramethyl-5-methylene-18,27,28,29-tetraoxatetracyclo[21.3.1.13,7.111,15]nonacos-8-ene-12,19-dione                                                                                                                                                              在
                                                                                                                                                                                 
4-二甲氨基吡啶   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以93%的产率得到(1S,3S,7R,11S,15S,17R,21R,23R,25S,E)-17-((R)-1-((benzyloxy)methoxy)ethyl)-21-((tert-butyldiphenyl silyl)oxy)-11-methoxy-10,10,26,26-tetramethyl-5-methylene-25-((triethylsilyl)oxy)-18,27,28,29-tetraoxatetracyclo[21.3.1.13,7.111,15]nonacos-8-ene-12,19-dione