Construction of Halofunctionalized Indenes via a Cascade Prins‐Nazarov Cyclization Promoted by Dual Roles of BX
<sub>3</sub>
作者:Sabera Sultana、Yong Rok Lee
DOI:10.1002/adsc.201901266
日期:2020.2.21
carboxaldehydes and boron trihalides (BX3, X=F, Cl, Br, I) is described. A diverse array of halofunctionalized indenes substituted with a heterocycle has been synthesized regioselectively with BX3 as a promotor for the carbocyclization and a source of X− for halogenation. This reaction proceeds via a formal halogenative [4+1] cycloaddition between arylalkynes and carboxaldehydes promoted by boron trihalides to generate
描述了在特定类别的甲醛和三卤化硼(BX 3,X = F,Cl,Br,I)存在下,各种未活化的芳基炔烃向相应的1H-茚进行卤官能化的过程。用杂环取代的halofunctionalized茚的多样化已经BX区域选择性合成的3作为carbocyclization一个启动子和X的源-用于卤化。该反应通过由三卤化硼促进的芳基炔烃和甲醛之间的正式卤代[4 + 1]环加成反应进行,以生成卤代官能化的茚。卤代官能化的茚的有用性通过它们通过偶联,亲核取代和氧化转化为其他衍生物来证明。