Microwave-Assisted Nafion-H Catalyzed Friedel–Crafts Type Reaction of Aromatic Aldehydes with Arenes: Synthesis of Triarylmethanes
作者:Surya G. K. Prakash、Gabriella Fogassy、George A. Olah
DOI:10.1007/s10562-010-0406-0
日期:2010.9
A new solid acid Nafion-H, a perfluorinated sulfonic acid resin, catalyzed microwave-assisted synthesis of triarylmethanes is described. Various benzaldehydes react readily with arenes to provide the corresponding triarylmethanes in good to excellent yields. The reactions were carried out under solvent free conditions under microwave irradiation in a pressure vessel. The solvent free microwave irradiation
Niobium Pentachloride Mediated (Hetero)aromatic Aldehyde Friedel–Crafts Hydroxyalkylation with Arenes: An Efficient Strategy to Synthesize Triarylmethanes
作者:Shirley M. M. Rodrigues、Daniel Previdi、Giovanni S. Baviera、Alexandre A. Matias、Paulo M. Donate
DOI:10.1055/s-0037-1610727
日期:2019.12
his 75th birthday. Abstract Niobium pentachloride is an efficient and useful Lewis acid to conduct Friedel–Crafts hydroxyalkylation between arenes and (hetero)aromatic aldehydes, to generate triarylmethanes. This practical methodology offers several advantages, such as short reaction time, mild experimental conditions, and excellent yields. Niobium pentachloride is an efficient and useful Lewis acid
Under 'open-flask' and mild conditions, arenes condense smoothly with aromatic aldehydes in the presence of catalytic amount of FeCl3. The reaction tolerated a variety of substitutions and functional groups. This method provides a facile and direct access to symmetrical and unsymmetrical triarylmethane derivatives. (C) 2007 Elsevier Ltd. All rights reserved.