Stereoselective three-component cascade synthesis of α-substituted 2,4-dienamides from <i>gem</i>-difluorochloro ethanes
作者:Shyamsundar Das、Nakeun Ko、Eunsung Lee、Sang Eun Kim、Byung Chul Lee
DOI:10.1039/c9cc07100h
日期:——
Herein, we describe a new transition metal-free Claisen rearrangement for the synthesis of α-substituted 2,4-dienamides. The one-pot, stereoselective three-component cascade reaction between a series of propargyl alcohols, amines, and gem-difluorochloro ethane derivatives afforded various polysubstituted 2,4-dienamides in good yields. This synthetic method for 1,1-captodative dienes, α-substituted
在这里,我们描述了用于合成α-取代的2,4-二烯酰胺的新的无过渡金属的克莱森重排。一系列炔醇,胺,和之间的单罐,立体选择性三组分级联反应宝石以良好的收率得到各种取代2,4- dienamides -difluorochloro乙烷衍生物。这种用于1,1-巯基二烯,α-取代的2,4-二酰胺的合成方法可用于制备含有吲哚-2-酮或内酯部分的药物类似物。