作者:April Gu Gruhn、William Reusch
DOI:10.1016/s0040-4020(01)88035-2
日期:1993.9
The synthesis and acid-catalyzed rearrangements of cross-conjugated cyclobutylidene ketone 1 are described. With strong Bronsted acids it gave a mixture of 5,7-dimethyltetralin 10 and 2-cyclohexenyl-1-methyl-3-phenylbenzene 11, the former by an initial retroaldol reaction and the latter by a series of tautomerizations and electrocyclic reactions following cation induced four-membered ring cleavage
描述了交叉共轭环丁烯酮1的合成和酸催化重排。在强布朗斯台德酸的作用下,生成5,7-二甲基四氢化萘10和2-环己烯基-1-甲基-3-苯基苯11的混合物,前者通过初始逆醛醇反应,后者通过一系列互变异构化和阳离子诱导后的电环反应四元环裂解。碘代三甲基硅烷以优异的收率将1转化为11。氯化锡转换1至纳扎罗夫重排产物动力学控制混合物2,3和4。该混合物在反应条件下是稳定的,但是用甲苯磺酸处理将2完全转化为3。但是,即使在更苛刻的条件下,也不能诱导4异构化。