Substituted 3(2<i>H</i>)-Furanones by a Tandem Michael Addition/Palladium-Catalyzed Ring-Closing Protocol
作者:Jubi John、Henning Hopf
DOI:10.1002/ejoc.201201253
日期:2013.2
synthesis of substituted 3(2H)-furanones from activated alkenes and 4-chloroacetoacetate was developed. The first step of the tandem reaction is the Michael addition of an acetoacetate to the alkene followed by palladium-catalyzed ring closure of the adduct to form the furanone. The reaction was extended to a number of substituted alkenes, and the corresponding substituted 3(2H)-furanones were obtained
开发了一种新的钯催化路线,用于从活化的烯烃和 4-氯乙酰乙酸酯合成取代的 3(2H)-呋喃酮。串联反应的第一步是乙酰乙酸酯与烯烃的迈克尔加成,然后是钯催化的加合物闭环以形成呋喃酮。反应扩展到许多取代的烯烃,并以良好至极好的收率获得相应的取代 3(2H)-呋喃酮。