Palladium-Catalyzed Benzannulations of 1-(Indol-2-yl)but-3-yn-1-ols: Easy Access to Functionalized Carbazoles
作者:Subhendu Pramanik、Sarat Chatterjee、Rumjhum Banerjee、Chinmay Chowdhury
DOI:10.1021/acs.orglett.2c00182
日期:2022.3.18
direct synthesis of carbazoles having aryl and aryl ketone groups has been achieved through Pd(II)-catalyzed cascade reactions between 1-(indol-2-yl)but-3-yn-1-ols and aldehydes. The reaction proceeds through alkyne–carbonyl metathesis, an uncommon pathway using palladium catalysts, and constitutes a fast intermolecular assembly through four carbon–carbon bond formations in one pot. Absence of the aldehyde
通过 Pd(II) 催化的 1-(indol-2-yl)but-3-yn-1-ols 和醛之间的级联反应,已经实现了具有芳基和芳基酮基团的咔唑的原子经济直接合成。该反应通过炔烃-羰基复分解进行,这是一种使用钯催化剂的不常见途径,并通过在一个锅中形成四个碳-碳键形成快速的分子间组装。醛底物的缺失导致形成 C4-芳基取代的咔唑。该反应适用于双咔唑衍生物的合成。