Palladium-catalyzed regioselective direct C–H bond alkoxycarbonylation of 2-arylimidazo[1,2-<i>a</i>]pyridines
作者:Arezoo Tanbakouchian、Ebrahim Kianmehr
DOI:10.1039/d1nj00605c
日期:——
A palladium-catalyzed practical and efficient method to access alkoxycarbonylated imidazo[1,2-a]pyridines at the C-3 position has been developed based on the association of W(CO)6 as a safe and easy-to-handle CO surrogate and related alcohols. Through this synthetic strategy, a wide range of alkoxycarbonylated imidazo[1,2-a]pyridines with moderate to high yields have been prepared, which are important
基于 W(CO) 6作为安全且易于处理的 CO 替代物的结合,开发了一种钯催化的实用且有效的方法来获取C-3 位的烷氧基羰基化咪唑并 [1,2- a ] 吡啶和相关的酒精。通过这种合成策略,已经制备了多种具有中等至高产率的烷氧基羰基化咪唑并[1,2- a ]吡啶,它们是医药产品中的重要结构基序。
Toward versatile methods leading to highly functionalized imidazo[1,2-a]pyridines
作者:Alexandra Basilio-Lopes、Thiago Mendonça de Aquino、Alexandre Mongeot、Jean-Jacques Bourguignon、Martine Schmitt
DOI:10.1016/j.tetlet.2012.02.117
日期:2012.5
A convenient and general method of preparation of polyfunctionalized imidazo[1,2-a]pyridines is reported. This methodology involves activation of secondary amides leading to the formation of the corresponding amidines 9. Different activating reagents have been evaluated and the efficiency of PCl5 was illustrated with alkyl functionalized groups. (C) 2012 Elsevier Ltd. All rights reserved.