Divergent Amine-Catalyzed [4 + 2] Annulation of Morita–Baylis–Hillman Allylic Acetates with Electron-Deficient Alkenes
作者:Silong Xu、Rongshun Chen、Zifeng Qin、Guiping Wu、Zhengjie He
DOI:10.1021/ol2032569
日期:2012.2.17
+ 2] annulation of Morita–Baylis–Hillman allylic acetates 2 with electron-deficient alkenes or diazenes has been developed for efficient syntheses of highly functionalized cyclohexenes, tetrahydropyridazines, and important spirocycles. This reaction unveils a new reactivity pattern of the intensely studied allylic compounds 2 acting as a C4 synthon in Lewis base catalyzed annulation reactions and also
已开发出一种胺催化的Morita-Baylis-Hillman烯丙基乙酸2与电子缺陷的烯或二氮烯环化的[4 + 2]环,可高效合成高度官能化的环己烯,四氢哒嗪和重要的螺环。该反应揭示了在Lewis碱催化的环化反应中被大量研究的烯丙基化合物2作为C 4合成子的新反应模式,并且还展示了叔胺和膦之间的发散催化作用。