Tritylium assisted iodine catalysis for the synthesis of unsymmetrical triarylmethanes
作者:Thibaut Courant、Marine Lombard、Dina V. Boyarskaya、Luc Neuville、Géraldine Masson
DOI:10.1039/d0ob01502d
日期:——
The combined Lewis acid catalytic system, generated from molecular iodine and tritylium tetrafluoroborate effectively catalyzed the Friedel–Crafts (FC) arylation of diarylmethyl sulfides providing an efficient access to various unsymmetrical triarylmethanes. The addition of tritylium and iodine created a more active catalytic system to promote the cleavage of sulfidic C–S bonds.
Microwave-Accelerated Alkylation of Arenes/Heteroarenes with Benzylic Alcohols Using Antimony(III) Chloride as Catalyst: Synthesis of O-Heterocycles
作者:Sandip Nayak、Prashant Shukla、Manoj Choudhary
DOI:10.1055/s-0030-1260795
日期:2011.7
An efficient protocol for alkylation of electron-rich arenes/heteroarenes with benzylicalcohols under microwave irradiation using antimony(III) chloride as catalyst has been developed. The mild reaction conditions, high yields, operational simplicity, and applicability to various substrates render the approach a useful route for the synthesis of diaryl/triarylalkane. In addition, a new route for the
Vanadium Catalyst for C‐ and S‐Alkylation of Benzhydrols in Water: An Experimental Study and Green Metrics Evaluation
作者:Pallavi Singh、Deep Chowdhury、Arup Mukherjee
DOI:10.1002/ejoc.202201300
日期:2023.1.17
A simple and easy-to-use strategy is reported that forms C−C and C−S bonds with a divanadium oxoperoxo catalyst. The reaction works well with various substrates in water under aerobic conditions.
Organocatalyzed Friedel–Crafts arylation of benzylic alcohols
作者:J. Adam McCubbin、Oleg V. Krokhin
DOI:10.1016/j.tetlet.2010.02.151
日期:2010.5
Electron-rich aromatic and heteroaromatic rings are functionalized directly with a variety of benzylic alcohols under mild conditions. The reaction is catalyzed by commercially available pentafluorophenylboronic acid, which is stable under ambient conditions and recoverable. The reaction itself is highly atom economical and produces water as the only byproduct. A Friedel-Crafts mechanism is proposed. (C) 2010 Elsevier Ltd. All rights reserved.
Au(III)/TPPMS-Catalyzed Benzylation of Indoles with Benzylic Alcohols in Water
作者:Hidemasa Hikawa、Hideharu Suzuki、Isao Azumaya
DOI:10.1021/jo402151g
日期:2013.12.6
A novel and efficient method for the Au(III)/TPPMS-catalyzed direct substitution reaction of benzhydryl and benzylic alcohols with indoles in water is developed. Au(III)/TPPMS is an effective catalyst for the benzylation of the strong pi nucleophile 1-methylindole, while common Bronsted or Lewis acids are ineffective.