An Efficient and Scalable One-Pot Double Michael Addition-Dieckmann Condensation for the Synthesis of 4,4-Disubstituted Cyclohexane β-Keto Esters
作者:Michael R. DeGraffenreid、Sarah Bennett、Sebastien Caille、Felix Gonzalez-Lopez de Turiso、Randall W. Hungate、Lisa D. Julian、Jacob A. Kaizerman、Dustin L. McMinn、Yosup Rew、Daqing Sun、Xuelei Yan、Jay P. Powers
DOI:10.1021/jo071202h
日期:2007.9.1
A simple, scalable, and efficient one-pot methodology for the synthesis of 4,4-disubstituted cyclohexane β-keto esters from benzylic nitriles or esters and methyl acrylate promoted by potassium tert-butoxide is described. The process relies on a tandem double Michael addition-Dieckmann condensation reaction, which results in the formation of three discrete carbon−carbon bonds in a single pot, including
描述了一种由苄基腈或由叔丁醇钾促进的丙烯酸甲酯合成4,4-二取代的环己烷β-酮酯的简单,可扩展且有效的一锅法。该过程依赖于串联双迈克尔加成-迪克曼缩合反应,该反应导致在一个单罐中(包括四元中心)形成三个离散的碳-碳键。该方法允许方便且快速地合成用于天然产物合成和药物化学的各种4-芳基-4-氰基-2-羰基甲氧基环己酮和4-芳基-2,4-双羰基甲氧基环己酮结构单元。