KF-alumina was found to be an efficient base for the synthesis of sterically hindered alpha-substituted carboxylic acids. A series of Bargellini reactions were performed by using various substituted anilines, phenols, and thiophenols as nucleophiles with ketones in the presence of chloroform and KF-alumina as a base. All the compounds were fully characterized. (C) 2010 Elsevier Ltd. All rights reserved.
KF-alumina was found to be an efficient base for the synthesis of sterically hindered alpha-substituted carboxylic acids. A series of Bargellini reactions were performed by using various substituted anilines, phenols, and thiophenols as nucleophiles with ketones in the presence of chloroform and KF-alumina as a base. All the compounds were fully characterized. (C) 2010 Elsevier Ltd. All rights reserved.