Organic hydrogen phosphites and hydrogen phosphates catalyzed Friedel–Crafts amidoalkylation of indoles with aryl aldimines
摘要:
A highly efficient and selective Friedel-Crafts amidoalkylation reaction of indoles with N-Ts aryl aldimines has been developed utilizing dimethyl hydrogen phosphite or diphenyl hydrogen phosphate as the organocatalysts, providing a facile and cost-effective process for synthesis of 3-indolyl methanamine derivatives in good to excellent yields. This transformation displays a broad substrate scope and wide functional-group tolerability, regardless of the electronic and steric properties of N-Ts aryl aldimines. Given that the developed catalytic Friedel-Crafts amidoalkylation reaction exhibits several salient features such as metal-free catalysis, high efficiency, low cost and mild reaction condition, this process might have practical applications in the synthesis of 3-indolyl methanamine derivatives. (C) 2011 Elsevier Ltd. All rights reserved.
Access to Chiral Bisphenol Ligands (BPOL) through Desymmetrizing Asymmetric Ortho-Selective Halogenation
作者:Xiaodong Xiong、Tianyu Zheng、Xinyan Wang、Ying-Lung Steve Tse、Ying-Yeung Yeung
DOI:10.1016/j.chempr.2020.01.009
日期:2020.4
Privileged chiral catalyst scaffolds are highly useful in chemical synthesis such as drug preparation. Substituted phenol ligands are among the most frequently used scaffolds. However, the preparation of chiral phenol ligands commonly involves tedious synthetic procedures. Herein, we describe a facile strategy to prepare potent chiral bisphenols (BPOLs) through the desymmetrizing asymmetric ortho-halogenation
[EN] POLYMER SUPPORTED PHOSPHORIC ACIDS AND USE THEREOF AS CATALYSTS IN THE PREPARATION OF 3-INDOLYLMETHANAMINES<br/>[FR] ACIDES PHOSPHORIQUES SUPPORTÉS SUR POLYMÈRES ET LEUR UTILISATION EN TANT QUE CATALYSEURS DANS LA PRÉPARATION DE 3-INDOLYLMÉTHANAMINES
申请人:FUNDACIÓ INST CATAL D INVESTIGACIÓ QUÍMICA ICIQ
公开号:WO2015086793A1
公开(公告)日:2015-06-18
The present invention relates to the field of catalysis, more particularly to the field of organocatalysis and to polymer supported chiral phosphoric acid catalysts. It also relates to the use of these compounds in the preparation of chiral 3-indolylmethanamines Formula (I).
The present invention relates to the field of catalysis, more particularly to the field of organocatalysis and to polymer supported chiral phosphoric acid catalysts. It also relates to the use of these compounds in the preparation of chiral 3-indolylmethanamines.
Enantioselective Synthesis of Unsymmetrical Triarylmethanes by Chiral Brønsted Acids
作者:Feng-Lai Sun、Xiao-Jian Zheng、Qing Gu、Qing-Li He、Shu-Li You
DOI:10.1002/ejoc.200901164
日期:2010.1
Chiral Bronsted acid catalyzed Friedel-Crafts alkylation of electron-rich arenes with (3-indolyl)methanamines has been realized to provide an efficient synthesis of enantioenriched unsymmetricaltriarylmethanes. With 5 mol-% of a newly developed chiral phosphoric acid, the enantioenriched unsymmetricaltriarylmethanes were obtained in excellent yields with up to 91 % ee.
手性布朗斯台德酸催化富电子芳烃与(3-吲哚基)甲胺的弗瑞德-克来福特烷基化已被实现,以提供对映体富集的不对称三芳基甲烷的有效合成。使用 5 mol-% 的新开发的手性磷酸,以高达 91% ee 的优异收率获得对映体富集的不对称三芳基甲烷。