Stable and Reusable Binaphthyl‐Supported Palladium Catalyst for Aminocarbonylation of Aryl Iodides
作者:Nidhi Sharma、Govindasamy Sekar
DOI:10.1002/adsc.201500642
日期:2016.1.21
A binaphthyl‐supported Pd nanoparticles (Pd‐BNP)‐catalyzed aminocarbonylation of aryliodides in the presence of carbon monoxide and amines for the synthesis of amides has been developed. This methodology provides an efficient route for the synthesis of a COX‐2 enzyme inhibitor having anti‐inflammatory activity.
and pyrido[2,3-d]pyrimidin-4(3H)-ones from easily available 2-halobenzamides (or 2-halonicotinamides), aldehydes, and sodium azide has been developed, which gave the corresponding target products in 50–95% yields for 29 examples. This remarkable consecutive process involved sequential copper-catalyzed SNAr, reduction, cyclization, and oxidation. Notably, this work would provide a novel synthetic strategy
从容易获得的2-卤代苯甲酰胺(或2-卤代烟酰胺)中高效,实用地铜催化连续合成喹唑啉-4(3 H)-酮和吡啶并[2,3 - d ]嘧啶-4(3 H)-酮,已开发出醛和叠氮化钠,从而使29个实例的相应目标产物收率达到50-95%。这个非同寻常的连续过程涉及连续的铜催化的S N Ar,还原,环化和氧化。值得注意的是,这项工作将为含有喹唑啉酮类骨架的生物活性分子提供一种新颖的合成策略。
Carboxamide-Accelerated Chemoselective Borylation of Iodoarenes under Photoirradiation
during the reaction. Mechanistic studies revealed that the key to the success of this reaction is the generation of a diboron-bridged five-membered ring as a transition state, in which the diboron-bridged five-membered ring and the benzene ring in the transition state are perpendicular to each other, owing to steric repulsion by the iodine atom at the ortho position. This chemoselectivity is suitable for
Supported-Pd catalyzed carbonylative synthesis of phthalimides and isoindolinones using Oxalic acid as in situ CO surrogate with 2-iodobenzamides and 2-iodobenzylanilines in ppm-level catalyst loading
作者:Shankar Ram、Pushkar Mehara、Ashish Kumar、Ajay Kumar Sharma、Arvind Singh Chauhan、Ajay Kumar、Pralay Das