作者:Lim Keow Bee、John W. Everett、Peter J. Garratt
DOI:10.1016/0040-4020(77)80330-x
日期:——
A number of reactions of bicyclobutylidene (1) and 1,3-bis(trimethylene)propadiene (2), directed towards the preparation of compounds in which conjugated and steric effects of the cyclobutane ring could be evaluated, are described. Trispiro[3.0.3.0.2.0] undecane (4) was prepared from 1, and 1-cyclobutylidenespiro[3.2]hexane (8b) from 2. Thermolysis of 8b gave 9-methylenedispiro[3.0.3.1]nonane (14)
描述了针对化合物的制备的联环丁烯(1)和1,3-双(三亚甲基)丙二烯(2)的许多反应,其中可以评估环丁烷环的共轭和空间效应。Trispiro [3.0.3.0.2.0]十一烷(4)从1制备,和1- cyclobutylidenespiro [3.2]己烷(8B从2.热分解)8b中,得到9- methylenedispiro [3.0.3.1]壬烷(14)。氧化1与单线态氧,得到“烯”产品17,并且经由bromohydroperoxide企图两步转化成二恶丁环19也给17。氧化2与过氧酸反应得到的产物可能来自氧化烯或双环氧乙烷。环丁烷环似乎没有提供任何空间保护以允许分离二氧杂环丁烷或氧化烯。描述了针对双环丁烯基的合成的三种不成功的路线(24),并且报道了双环丁烯-2,4'-二酮(39)和-2,2'-二酮(40)的合成。