Arene Cyanation via Cation-Radical Accelerated-Nucleophilic Aromatic Substitution
作者:Natalie Holmberg-Douglas、David A. Nicewicz
DOI:10.1021/acs.orglett.9b02678
日期:2019.9.6
Herein we describe a cation radical-accelerated-nucleophilic aromatic substitution (CRA-SNAr) of alkoxy arenes utilizing a highly oxidizing acridinium photoredox catalyst and acetone cyanohydrin, an inexpensive and commercially available cyanide source. This cyanation is selective for carbon-oxygen (C-O) bond functionalization and is applicable to a range of methoxyarenes and dimethoxyarenes. Furthermore
DIRECT AROMATIC CARBON-OXYGEN AND CARBON-HYDROGEN BOND FUNCTIONALIZATION VIA ORGANIC PHOTOREDOX CATALYST
申请人:THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
公开号:US20220169581A1
公开(公告)日:2022-06-02
The invention generally relates to methods of making substituted arenes via direct C—H, C—O, C—S, or C—N bond conversion and methods of synthesizing isotopically-labeled substituted arenes via direct carbon-halogen bond conversion. The invention also relates to anaerobic catalyst systems comprising an acridinium photocatalyst and a nucleophile selected from a halide, a cyanide, and an isotopically-labeled amine. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
A General Strategy for Organocatalytic Activation of C–H Bonds via Photoredox Catalysis: Direct Arylation of Benzylic Ethers
作者:Katrine Qvortrup、Danica A. Rankic、David W. C. MacMillan
DOI:10.1021/ja411596q
日期:2014.1.15
Direct C-H functionalization and arylation of benzyl ethers has been accomplished via photoredox organocatalysis. The productive merger of a thiol catalyst and a commercially available iridium photoredox catalyst in the presence of household light directly affords benzylic arylation products in good to excellent yield. The utility of this methodology is further demonstrated in direct arylation of 2,5-dihydrofuran to form a single regioisomer.
In the past years, the activations of aromaticnitriles for radical arylations under photoirradiation have been developed. We here report the first example of radical arylations using aromaticnitriles without the assistance of photoirradiation. Importantly, with this method, the direct arylation of C(sp3)–H in benzyl amines provided a practical method for the synthesis of diarylmethylamines without