Ph3P-I2 mediated aryl esterification with a mechanistic insight
摘要:
In order to better understand the reaction mechanism and to obtain optimal conditions, the Ph3P-I-2/Et3N mediated aryl esterification reaction was thoroughly investigated. Using a specific reagent addition sequence, the reaction proceeds remarkably well especially with acidic substrates. P-31 NMR studies revealed that the formation of an aryloxyphosphonium salt is crucial in governing the reaction path toward the formation of phenolic esters. (C) 2016 Elsevier Ltd. All rights reserved.
A simple procedure affording benzoates through a NHC‐catalyzed aerobicoxidativeesterification of aldehydes with organoboronic acids has been disclosed. This process allows access to a wide variety of aromatic esters in good to excellent yields under simple, efficient, and sustainable reaction conditions (see scheme).
Ni/g‐C
<sub>3</sub>
N
<sub>4</sub>
Photocatalysis: Aerobic Oxidative Coupling Reaction Leading to Amidation of Aldehydes with Amines and C−N, C−O, and C−C Cross‐Coupling Reaction
作者:Zahra Akrami、Mona Hosseini‐Sarvari
DOI:10.1002/ejoc.202200429
日期:2022.6.27
Graphitic carbonnitrides bonded with nickel can induce mild aerobicoxidativecoupling reactions. Amidation of aldehydes with amines was reported, as well as the cross-coupling of C−N, C−O, and C−C aryl halides with amines, alcohols, and carboxylic acid.
In order to better understand the reaction mechanism and to obtain optimal conditions, the Ph3P-I-2/Et3N mediated aryl esterification reaction was thoroughly investigated. Using a specific reagent addition sequence, the reaction proceeds remarkably well especially with acidic substrates. P-31 NMR studies revealed that the formation of an aryloxyphosphonium salt is crucial in governing the reaction path toward the formation of phenolic esters. (C) 2016 Elsevier Ltd. All rights reserved.