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 Oxidative C–O Bond Formation of 2-Acyl Phenols and 1,3-Dicarbonyl Compounds with Ethers: Direct Access to Phenol Esters and Enol Esters
作者:Jihye Park、Sang Hoon Han、Satyasheel Sharma、Sangil Han、Youngmi Shin、Neeraj Kumar Mishra、Jong Hwan Kwak、Cheong Hoon Lee、Jeongmi Lee、In Su Kim
DOI:10.1021/jo500576x
日期:2014.5.16
A copper-catalyzed oxidative coupling of 2-carbonyl-substituted phenols and 1,3-dicarbonyl compounds with a wide range of dibenzyl or dialkyl ethers is described. This protocol provides an efficient preparation of phenol esters and enol esters in good yields with high chemoselectivity. This method represents an alternative protocol for classical esterification reactions.
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.