USE OF COMPOSITIONS OBTAINED BY CALCINING PARTICULAR METAL-ACCUMULATING PLANTS FOR IMPLEMENTING CATALYTICAL REACTIONS
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:US20150376224A1
公开(公告)日:2015-12-31
The use of metal-accumulating plants for implementing chemical reactions especially catalytical reactions.
金属积累植物用于实现化学反应,特别是催化反应的使用。
BI-OAc-Accelerated C3–H Alkylation of Quinoxalin-2(1<i>H</i>)-ones under Visible-Light Irradiation
作者:Xiang-Kui He、Juan Lu、Ai-Jun Zhang、Qing-Qing Zhang、Guo-Yong Xu、Jun Xuan
DOI:10.1021/acs.orglett.0c02080
日期:2020.8.7
photoredox-catalyst-free radical alkylation of quinoxalin-2(1H)-ones has been described. This reaction utilizes 4-alkyl-1,4-dihydropyridines (R-DHPs) as alkyl radicalprecursors and acetoxybenziodoxole (BI-OAc) as an electron acceptor to undergo single-electron transfer with photoexcited R-DHPs. The benign conditions allow for good compatibility in the scope of both quinoxalin-2(1H)-ones and R-DHPs. The
Cobalt and Manganese Salts of p -Aminobenzoic Acid Supported on Silica Gel: A Versatile Catalyst for Oxidation by Molecular Oxygen
作者:Mohammed M. Hashemi、Yusef Ahmadibeni
DOI:10.1007/s00706-002-0534-3
日期:2003.2.1
A 1:1 molar ratio of the cobalt and manganese salts of p -amino benzoic acid supported on silica gel is an effective catalyst for the oxidation of various organic compounds in reasonable yields using molecular oxygen. The catalyst can be reused several times.
Light‐Driven Carbene Catalysis for the Synthesis of Aliphatic and α‐Amino Ketones
作者:Anna V. Bay、Keegan P. Fitzpatrick、Gisela A. González‐Montiel、Abdikani Omar Farah、Paul Ha‐Yeon Cheong、Karl A. Scheidt
DOI:10.1002/anie.202105354
日期:2021.8.9
Catalyst potential is harnessed in the visible-light driven generation of an acyl azolium radical species that undergoes selective coupling with various radical partners to afford diverse ketone products. This methodology is showcased in the direct late-stage functionalization of amino acids and pharmaceutical compounds, highlighting the utility of single-electron NHC operators.
Enantioselective Alkylamination of Unactivated Alkenes under Copper Catalysis
作者:Zibo Bai、Heng Zhang、Hao Wang、Hanrui Yu、Gong Chen、Gang He
DOI:10.1021/jacs.0c12333
日期:2021.1.20
An enantioselective addition reaction of various alkyl groups to unactivated internal alkenes under Cu catalysis has been developed. The reaction uses amide-linked aminoquinoline as the directing group, 4-alkyl Hantzsch esters as the donor of alkyl radicals, and rarely used biaryl diphosphine oxide as a chiral ligand. β-lactams featuring two contiguous stereocenters at Cβ and the β substituent can