An efficient and practical synthesis of triaryl and trisindolylmethanes is reported via the bisarylation of aryl aldehydes with activated arenes. The new method features mild solvent-free reaction conditions, in most cases nearly stoichiometric reagent ratios, catalytic amount of the readily available, easily-handled, recoverable and reusable Brønsted acid catalyst o-benzenedisulfonimide.
Efficient synthesis of triarylmethanes via bisarylation of aryl aldehydes with arenes catalyzed by silica gel-supported sodium hydrogen sulfate
作者:Yixin Leng、Fang Chen、Li Zuo、Wenhu Duan
DOI:10.1016/j.tetlet.2010.02.157
日期:2010.4
An efficient synthesis of triarylmethanes has been developed via bisarylation of aryl aldehydes with arenes catalyzed by silicagel-supportedsodiumhydrogensulfate in a solvent-free system. The new method features high yield, mild reaction conditions, and environmental friendliness.
Melamine Trisulfonic Acid: A New Efficient Catalyst for the Synthesis of Aryldithienylmethanes
作者:Liqiang Wu、Yunhui Yan、Fulin Yan
DOI:10.1080/10426507.2011.559496
日期:2012.2.1
Abstract An efficient method has been developed for the synthesis of dithienylmethanes via bisarylation of aldehydes with thiophene in the presence of melamine trisulfonic acid as a catalyst under solvent-free conditions. GRAPHICAL ABSTRACT
Unique versatility of Amberlyst 15. An acid and solvent-free paradigm towards synthesis of bis(heterocyclyl)methane derivatives
作者:Kamaljit Singh、Shivali Sharma、Amit Sharma
DOI:10.1016/j.molcata.2011.07.007
日期:2011.8
Bis(heterocyclyl)methanes, key intermediates for a variety of chemical, biochemical and material science relevant targets, have been obtained in a synthetically useful manner using Amberlyst 15 ion-exchange resin. This method promises versatility, cost-effectiveness, and efficiency. (C) 2011 Elsevier B.V. All rights reserved.
Dual-Reagent Catalysis within Ir−Sn Domain: Highly Selective Alkylation of Arenes and Heteroarenes with Aromatic Aldehydes
作者:Susmita Podder、Joyanta Choudhury、Ujjal Kanti Roy、Sujit Roy
DOI:10.1021/jo062633n
日期:2007.4.1
Reactions of arenes and heteroarenes with aromatic aldehydes proceeded smoothly in the presence of a catalytic combination of [Ir(COD)Cl](2)-SnCl4 to afford the corresponding triarylmethane derivatives (TRAMs) in high yields. This 100% TRAM selective transformation is clean and eliminates the use of acid systems.