methyl 4-(diethylphosphono)crotonate   、                                                                                      
(2R,3R,4R,5S,6R)-5,7-di-[(tert-butyldimethylsilyl)oxy]-3-(4-methoxybenzyl)oxy-2,4,6-trimethylheptanal                                                                                                                                                              在
                                                                                                                                                                                 
lithium diisopropyl amide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以2.61 g的产率得到(2E,4E)-(6S,7S,8R,9S,10R)-9,11-bis-(tert-butyl-dimethyl-silanyloxy)-7-(4-methoxy-benzyloxy)-6,8,10-trimethyl-undeca-2,4-dienoic acid methyl ester