Polystyrene-supported cu(II)-R-Box as recyclable catalyst in asymmetric Friedel–Crafts reaction
作者:V. G. Desyatkin、M. V. Anokhin、V. O. Rodionov、I. P. Beletskaya
DOI:10.1134/s1070428016120010
日期:2016.12
complex of copper(II) trifluoromethanesulfonate with chiral isopropyl bis(oxazoline) ligand (i-Pr-Box) was immobilized on accessible and inexpensive Merrifield resin according to a “click” procedure. The resulting catalyst showed high efficiency and recyclability in the asymmetricFriedel–Craftsalkylation of indole and its derivatives. The catalyst can be recycled five times without appreciable loss in
Synthesis of heteroarylidene malonate derived bis(thiazolines) and their application in the catalyzed Friedel–Crafts reaction
作者:Lei Liu、Jing Li、Mingan Wang、Fengpei Du、Zhaohai Qin、Bin Fu
DOI:10.1016/j.tetasy.2011.03.003
日期:2011.3
A series of novel heteroarylidene malonate derived bis(thiazoline) ligands 1 and 2 were synthesized and applied to a Friedel-Crafts reaction between indole and alkylidene malonate. The Cu(OTf)(2) complex of ligand 2b bearing a benzyl group afforded moderate to excellent enantioselectivity for the adducts (up to >99% ee). (C) 2011 Elsevier Ltd. All rights reserved.
Cu(OTf)<sub>2</sub>-Catalyzed Asymmetric Friedel–Crafts Alkylation Reaction of Indoles with Arylidene Malonates Using Bis(sulfonamide)-Diamine Ligands
作者:Jing Wu、Dongping Wang、Fan Wu、Boshun Wan
DOI:10.1021/jo400747d
日期:2013.6.7
highly efficient Cu-catalyzed asymmetric Friedel Crafts alkylation reaction of indoles with arylidene malonates using simple, stable, and easily prepared bis-sulfonamide diamine ligands was developed. The desired products were obtained in up to 99% yield with 96% ee.