Enantioselective Continuous-Flow Production of 3-Indolylmethanamines Mediated by an Immobilized Phosphoric Acid Catalyst
作者:Laura Osorio-Planes、Carles Rodríguez-Escrich、Miquel A. Pericàs
DOI:10.1002/chem.201303860
日期:2014.2.17
polystyrene‐supported 1,1’‐bi‐2‐naphthol derived phosphoricacid has been synthesized and applied in the enantioselective Friedel–Crafts reaction of indoles and sulfonylimines. The immobilizedcatalyst was highly active and selective, and gave rise to a broad range of 3‐indolylmethanamines (19 examples) in high yields and excellent enantioselectivities (up to 98 % enantiomeric excess) after short reaction
Chiral Sulfonimide as a Brønsted Acid Organocatalyst for Asymmetric Friedel–Crafts Alkylation of Indoles with Imines
作者:Ling-Yan Chen、Hao He、Wing-Hong Chan、Albert W. M. Lee
DOI:10.1021/jo2011335
日期:2011.9.2
Binaphthyl-based chiral sulfonimide (CSI) is demonstrated for the first time to be an efficient, strong Brønsted acid in asymmetric organocatalysis. A series of CSIs were synthesized and screened in the asymmetric Friedel–Crafts alkylation of indoles with imines. Good to excellent yields and enantioselectivities have been achieved. It was proved that it was crucial to wash the CSI catalyst with HCl
Squaramide-catalyzed enantioselective Friedel–Crafts reaction of indoles with imines
作者:Yong Qian、Gaoyuan Ma、Aifeng Lv、Hai-Liang Zhu、Jing Zhao、Viresh H. Rawal
DOI:10.1039/b922120d
日期:——
Chiral squaramides are highly enantioselective catalysts for FriedelâCrafts reaction of indoles with N-tosyl imines, affording 3-indolyl methanamine products in 85â96% yields and 84â96% ees.
Design of Planar Chiral Phosphoric Acids with a [2.2]Paracyclophanyl Backbone as Organocatalysts for the Highly Enantioselective Aza-Friedel–Crafts Reaction
作者:En Xie、Shaoying Huang、Xufeng Lin
DOI:10.1021/acs.orglett.9b01127
日期:2019.5.17
A new type of robust planarchiral phosphoric acid bearing a [2.2]paracyclophane scaffold was synthesized and shown to be an optimal catalyst in asymmetric aza-Friedel–Crafts reactions for the first synthesis of enantioenriched styryl indolylmethanamine derivatives in good yields with excellent enantioselectivities (93–>99% ee) under 0.5–1 mol % catalyst loading.
[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).