Copper-Assisted Synthesis of 2-Hydroxyphenyl-1,2-diones from Phenols and 2-Oxoaldehydes
作者:Narsaiah Battini、Satyanarayana Battula、Qazi Naveed Ahmed
DOI:10.1002/ejoc.201501423
日期:2016.2
An efficient copper(II)‐catalyzed protocol for the ortho‐functionalization of phenols is developed. This method tolerates a wide variety of 2‐oxoaldehydes and phenols and affords the corresponding 2‐hydroxyphenyl‐1,2‐diones in appreciable yields.
One-pot synthesis of unsymmetrical benzils from aryl methyl ketones and arenes in the presence of selenous acid catalysed by p-toluenesulfonic acid monohydrate
A modified one-pot method for the synthesis of unsymmetrical and heteroaryl benzils from substituted acetophenones and unactivated or weakly activated arenes by the use of H2SeO3 and p-TsOH center dot H2O as catalysts at 35 degrees C is established. The present method is regioselective and avoids the use of p-TsOH center dot H2O in stoichiometric amount in the presence of H2SeO3 and afforded unsymmetrical benzils in good yields. (C) 2012 Elsevier Ltd. All rights reserved.