Directing Group Assisted Copper-Catalyzed Chemoselective O-Aroylation of Phenols and Enols Using Alkylbenzenes
摘要:
By using alkylbenzenes as aroyl surrogates, copper(II) catalyzed chemoselective O-aroylations of 1,3-dicarbonyl compounds and phenolic -OH ortho to carbonyl (-CHO, -COR) groups have been achieved. A dual mechanism operating in tandem for these transformations has been supported by a crossover experiment.
copper-catalyzed chemoselective oxidative O-aroylation of 2-acetylphenols, alkyl salicylates and 1,3-dicarbonyl compounds with a wide range of styrene derivatives are described. This approach provides an efficient chemoselective preparation of phenol, alkyl salicylate and enol esters in good to excellent yields. This method represents an alternative protocol for the classical esterification reactions.
A compound of formula
(wherein R, R₁ and R₂ have the meanings given in the description),
salts thereof with pharmaceutically acceptable organic or inorganic acids, process and intermediates for the preparation thereof and a pharmaceutical composition containing said compound are described.
The compounds of formula I and the salts thereof are useful in the treatment of heart and renal deases.
一种式化合物
(其中 R、R₁ 和 R₂ 的含义如说明书所述)、
描述了其与药学上可接受的有机酸或无机酸的盐、其制备工艺和中间体以及含有所述化合物的药物组合物。
式 I 化合物及其盐类可用于治疗心脏病和肾病。
Directing Group Assisted Copper-Catalyzed Chemoselective <i>O</i>-Aroylation of Phenols and Enols Using Alkylbenzenes
作者:Saroj Kumar Rout、Srimanta Guin、Arghya Banerjee、Nilufa Khatun、Anupal Gogoi、Bhisma K. Patel
DOI:10.1021/ol401682a
日期:2013.8.16
By using alkylbenzenes as aroyl surrogates, copper(II) catalyzed chemoselective O-aroylations of 1,3-dicarbonyl compounds and phenolic -OH ortho to carbonyl (-CHO, -COR) groups have been achieved. A dual mechanism operating in tandem for these transformations has been supported by a crossover experiment.