(S,E)-6-tert-butyldiphenylsilyloxy-4-methyl-1-((1S,3R,5S)-5-methyl-1-((2R,5R,)-5-methyl-5-vinyltetrahydrofuran-2-yl)-2,8-dioxabicyclo[3.2.1]octan-3-yl)-2-methylenehex-4-en-1-ol                                                                                                                                                              在
                                                                                                                                                                                 
四丁基氟化铵                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 18.5h,
                                                                                                                以93%的产率得到(S,E)-3-methyl-6-((1S,3R,5S)-5-methyl-1((2R,5R)-5-methyl-5-vinyltetrahydrofuran-2-yl)-2,8-dioxabicyclo[3.2.1]octan-3-yl)-5-methylenehex-2-ene-1,6-diol