作者:Tao Wang、Marvin Hoffmann、Andreas Dreuw、Edina Hasagić、Chao Hu、Philipp M. Stein、Sina Witzel、Hongwei Shi、Yangyang Yang、Matthias Rudolph、Fabian Stuck、Frank Rominger、Marion Kerscher、Peter Comba、A. Stephen K. Hashmi
DOI:10.1002/adsc.202100236
日期:2021.6.8
The synthesis of aryl amines via the formation of a C−N bond is an essential tool for the preparation of functional materials, active pharmaceutical ingredients and bioactive products. Usually, this chemical connection is only possible by transition metal-catalyzed reactions, photochemistry or electrochemistry. Here, we report a metal-free arene C−H amination using hydroxylamine derivatives under benign
A nickel precatalyst for efficient cross-coupling reactions of aryl tosylates with arylboronic acids: vital role of dppf
作者:Feng Hu、Xiangyang Lei
DOI:10.1016/j.tet.2014.04.059
日期:2014.6
An air-stable and easy-to-handle nickelprecatalyst, (9-phenanthrenyl)Ni(II)(PPh3)2Cl, was examined for the cross-couplingreactions of aryl tosylates with arylboronic acids. Under the optimized reaction conditions, the catalytic system tolerates a wide range of activated, neutral and deactivated substrates. The selectivity of this cross-couplingreaction towards aryl tosylates and arylboronic acids
Chromatography-Free and Eco-Friendly Synthesis of Aryl Tosylates and Mesylates
作者:Xiangyang Lei、Anusha Jalla、Mhd Abou Shama、Jamie Stafford、Billy Cao
DOI:10.1055/s-0034-1378867
日期:——
Two chromatography-free and eco-friendly protocols have been developed to synthesize aryl tosylates and mesylates by the tosylation and mesylation of the corresponding hydroxyarenes, respectively. These protocols are superior to other known ones regarding the simplicity, reaction time and conditions, the range of substrates, yields, and environmental friendliness.
[EN] NON-IONIC PHOTOACID GENERATORS WITH IMPROVED QUANTUM EFFICIENCY<br/>[FR] GENERATEURS DE PHOTOACIDES NON IONIQUES PRESENTANT UNE EFFICACITE QUANTIQUE AMELIOREE
申请人:PPG INDUSTRIES, INC.
公开号:WO1997048677A1
公开(公告)日:1997-12-24
(EN) Photoacid generator compounds are 2,6-dinitrobenzyl sulfonates substituted at the 4 position of the dinitrobenzyl group with an electron donating phenoxymethyl group. Also disclosed are methods of synthesizing the photoreactive compounds from 2,6-dinitro-1,4-bis(haloalkyl)benzene.(FR) L'invention concerne des composés générateurs de photoacides. Ces composés sont des 2,6-dinitrobenzyle sulfonates substitués à la position 4 du groupe dinitrobenzyle par un groupe phénoxyméthyle donneur d'électrons. L'invention traite aussi de procédés pour assurer la synthèse des composés photoréactifs à partir du 2,6-dinitro-1,4-bis(haloalkyle)benzène.
The Synthesis and Catalytic Activity of New Mixed NHC-Phosphite Nickel(0) Complexes
作者:Jeremy Duczynski、Alexandre N. Sobolev、Stephen A. Moggach、Reto Dorta、Scott G. Stewart
DOI:10.1021/acs.organomet.9b00672
日期:2020.1.13
Herein we describe the synthesis and isolation of the first low-valent NHC-phosphite nickelcomplexes of general formula Ni(NHC)[P(OAr)3]2. These three-coordinate Ni(0) compounds were fully characterized, including by X-ray crystallography that highlighted their trigonal planar geometry. The representative complex Ni(IMes)[P(OPh)3]2 was used to show that a phosphite ligand is readily substituted in