作者:Kenneth Bruce White、William Reusch
DOI:10.1016/0040-4020(78)88369-0
日期:1978.1
The reaction of cross-conjugated dienolate anions derived from substituted cyclohexenones with methyl acrylate and vinyl ketones has been studied. Bicyclo[2.2.2]octan-2-ones are formed by a sequential Michael mechanism; however, the reactions of vinyl ketones must be conducted under amine-free conditions. Unexpecedly, the conjugate base from 2,3-dimethylcyclohex-2-enone gives only a single Michael
研究了由取代的环己烯酮衍生的交叉共轭二烯酸根阴离子与丙烯酸甲酯和乙烯基酮的反应。双环[2.2.2] octan-2-ones是通过顺序迈克尔机制形成的;但是,乙烯基酮的反应必须在无胺条件下进行。出乎意料的是,由2,3-二甲基环己-2-烯酮形成的共轭碱仅与乙烯基酮产生单一的迈克尔加合物,并且如果被迫进一步反应,则会发生分子内的羟醛缩合。一种替代的Diels-Alder方法可用于双环[2.2.2]辛烷酮产品,证明是有效的。