Sridhar, P. Ramu; Sinha, Surajit; Chandrasekaran, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2002, vol. 41, # 1, p. 157 - 160
Carbonylative Suzuki–Miyaura couplings of sterically hindered aryl halides: synthesis of 2-aroylbenzoate derivatives
作者:Aya Ismael、Troels Skrydstrup、Annette Bayer
DOI:10.1039/d0ob00044b
日期:——
diversely substituted 2-aroylbenzoate esters featuring a new protocol for the carbonylative coupling of aryl bromides with boronic acids and a new strategy to favour carbonylative over non-carbonylative reactions. Two different synthetic pathways - (i) the alkoxycarbonylation of 2-bromo benzophenones and (ii) the carbonylative Suzuki-Miyaura coupling of 2-bromobenzoate esters - were evaluated. The latter approach
One-pot esterification and Ritter reaction: chemo- and regioselectivity from tert-butyl methyl ether
作者:Pankaj Dawar、M. Bhagavan Raju、Ramesha A. Ramakrishna
DOI:10.1016/j.tetlet.2011.04.100
日期:2011.8
tert-Butylmethyl ether (TBME) has been effectively used as a reagent for esterification of carboxylic acids. By varying amounts of sulfuric acid, a remarkable regioselectivity in esterification has been demonstrated. Additionally, under the present reaction conditions, one-pot esterification and Ritter reaction are achieved in almost quantitative yield.