(R)-1-{(R)-3a-[(R)-tert-butyldimethylsilyloxymethyl]-2,2-dimethyl-6,6a-dihydro-3aH-cyclopenta[d][1,3]dioxol-4-yl}-3-[(S)-2,2-dimethyl[1,3]dioxolan-4-yl]hexa-4,5-dien-1-yn-3-ol   、                                                                                      trimethoxonium tetrafluoroborate                                                                                                                                                              在
                                                                                                                                                                                 
1,8-双二甲氨基萘                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以85 mg的产率得到tert-butyl((R)-(R)-4-{(R)-3-[(S)-2,2-dimethyl[1,3]dioxolan-4-yl]-3-methoxyhexa-4,5-dien-1-ynyl}-2,2-dimethyl-6,6a-dihydrocyclopenta[1,3]dioxol-3a-ylmethoxy)dimethylsilane