Visible-Light-Driven Difluoroacetamidation of Unactive Arenes and Heteroarenes by Direct C–H Functionalization at Room Temperature
作者:Lin Wang、Xiao-Jing Wei、Wen-Liang Jia、Jian-Ji Zhong、Li-Zhu Wu、Qiang Liu
DOI:10.1021/ol502676y
日期:2014.11.21
The directed difluoroacetamidation of unactivated arenes and heteroarenes with bromodifluoroacetamides via visible-light photoredox catalysis has been efficiently achieved at room temperature. Broad utility of this transformation is presented, including electronically deficient heteroaromatic and aromatic systems. The mechanistic pathway of the difluoroacetamidation was discussed based on photoluminescence
Sustainable Radical Cascades to Synthesize Difluoroalkylated Pyrrolo[1,2-<i>a</i>]indoles
作者:Honggui Huang、Menglin Yu、Xiaolong Su、Peng Guo、Jia Zhao、Jiabing Zhou、Yi Li
DOI:10.1021/acs.joc.7b03017
日期:2018.2.16
We disclose herein a photocatalytic difluoroalkylation and cyclization cascade reaction of N-(but-2-enoyl)indoles with broad substrate scopes in up to 90% isolated yield. This method provides sustainable and efficient access to synthesize difluoroalkylated pyrrolo[1,2-a]indoles with a quaternary carbon center under mild conditions.
我们在此公开了N-(丁-2-烯酰基)吲哚具有宽的底物范围的光催化二氟烷基化和环化级联反应,其分离产率高达90%。该方法提供了在温和条件下可持续有效地合成具有季碳中心的二氟烷基化吡咯并[1,2- a ]吲哚的方法。
A Radical-Initiated Fragmentary Rearrangement Cascade of Ene-Ynamides to [1,2]-Annulated Indoles via Site-Selective Cyclization
作者:Sifan Li、Yu Wang、Zibo Wu、Weiliang Shi、Yibo Lei、Paul W. Davies、Wei Shu
DOI:10.1021/acs.orglett.1c02519
日期:2021.9.17
Herein, a radical triggered fragmentary cyclization cascade reaction of ene-ynamides is presented, providing a rapid access into [1,2]-annulated indoles by an intermolecular radical addition, intramolecular cyclization, desulfonylative aryl migration, and site-selective C(sp2)-N cyclization sequence. DFT calculations support oxidation of N-centered radical species to cations prior to the C–N bond formation
efficiently construct complex molecular structures from simple precursors. Herein, a novel ruthenium-catalyzed three-component highly selective remote C–H functionalization of 8-aminoquinolineamides has been described. The reaction tolerates a wide range of functional groups, producing arylation/difluoroalkylation products of olefins with potential biological activity and pharmaceutical value. Radical
Copper-Catalyzed 1,6-Hydrodifluoroacetylation of<i>para</i>-Quinone Methides at Ambient Temperature with Bis(pinacolato)diboron as Reductant
作者:Miaolin Ke、Qiuling Song
DOI:10.1002/adsc.201600991
日期:2017.2.2
6‐hydrodifluoroacetylation of para‐quinone methides with difluoroalkyl bromides has been described with bis(pinacolato)diboron (B2pin2) as reductant. In this reaction, a new C(sp3)–CF2 bond is constructed under smart conditions. A broad substrate scope of para‐quinone methides (p‐QMs) make this protocol very practical and attractive. Preliminary mechanisticstudies manifested that a difluoroalkyl radical