Palladium‐Catalyzed Solvent‐Controlled Selective Synthesis of Acyl Isoureas and Imides from Amides, Isocyanides, Alcohols and Carboxylates
作者:Ming Cao、Liqiu Liu、Shi Tang、Zhiyuan Peng、Yingchun Wang
DOI:10.1002/adsc.201801245
日期:2019.4.16
A highly selective synthesis of acyl isoureas and imides from readily accessible amides, isocyanides, alcohols and carboxylates based on reaction solvent selection is described. In the presence of a catalytic amount of [1,1′‐bis(diphenylphosphino)ferrocene]dichloropalladium(II) and cupric acetate, treatment of amides and isocyanides in alcohols at 60 °C provided acyl isoureas in high yields. Interestingly
In this Letter, we report the aerobic photo-oxidative synthesis of diacylamines from benzylamides in the presence of molecular oxygen and catalytic amounts of 2-chloroanthraquinones under visible light irradiation from a fluorescent lamp. (C) 2014 Elsevier Ltd. All rights reserved.
Aerobic oxidation with N-hydroxyphthalimide catalysts in ionic liquid
N-Hydroxyphthalimide (NHPI)-catalyzed aerobic oxidations in the ionic liquids were examined for the first time. Both NHPI and its ionic derivative, 3-pyridinylmethyl-N-hydroxyphthalimide (Py-NHPI), were found to have better performance in the ionic liquid than in the conventional organic solvents for the aerobic oxidation of N-alkylamides to imides. On the other hand, Py-NHPI was found to be a much better catalyst than NHPI for the aerobic oxidation of benzylic compounds in the ionic liquid. (c) 2005 Elsevier Ltd. All rights reserved.
Aerobic photooxidation of benzylamide under visible light irradiation with a combination of 48% aq HBr and Ca(OH)2
Benzylamides were found to be oxidized to their corresponding diacylamines in the presence of molecular oxygen, catalytic 48% aq HBr, and Ca(OH)(2) under visible light irradiation of a fluorescent lamp. (C) 2010 Elsevier Ltd. All rights reserved.