stereoselective addition of alkylmetals to 2-(trimethylsilylmethyl)-1-cyclobutyl ketones and the ZnBr2-catalyzed stereospecific ring-opening reaction of resulting 1-methoxymethyl-2-(trimethylsilylmethyl)cyclobutanes gave 1,1,5-trisubstituted 1,5-dienes with high stereoselectivity.
                                    烷基
金属与 2-(三甲基甲
硅烷基甲基)-1-
环丁基酮的立体选择性加成和 ZnBr2 催化立体有择的开环反应生成 1-甲氧基甲基-2-(三甲基甲
硅烷基甲基)
环丁烷,得到 1,1,5-三取代的 1,5-具有高立体选择性的二烯。