Pd-Catalyzed Threefold Arylation of Baylis-Hillman Bromides and Acetates with Triarylbismuth Reagents
作者:Maddali L. N. Rao、Somnath Giri
DOI:10.1002/ejoc.201200543
日期:2012.8
alkyl 2-benzylacrylates and 2-benzylacrylonitriles were synthesized by means of atom-economic cross-couplings of Baylis–Hillmanbromides or acetates with BiAr3 under palladium-catalyzed conditions. These reactions, involving threefold aryl couplings using BiAr3 reagents with bromides and acetates, are fast and are completed in 1–2 h with high product yields.
申请人:The Board of Regents of the Nevada System of Higher Education on Behalf of the Unive. of Nevada
公开号:US20180118770A1
公开(公告)日:2018-05-03
Provided herein are N-heterocyclic phosphines (NHPs) useful in metal-free phosphorus-carbon bond forming reactions. Methods for preparing vinylphosphonates using NHPs also are provided. 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.
Stable organozinc compounds derived from alkyl-3-alkyl-2-(bromomethyl)-proenoates have been prepared. NMR 13C, 1H and IR stidies show only one Z stereoisomer (no methylenic form) with a strong chelation between zinc and the carbonyl oxygen of the ester and solvated by only one solvent molecule. Hydrolysis can be achieved by two concurrent mechanisms with or without transposition.
An electron-donor–acceptor complex between two intermediates enables a N–N bond cleavage cascade process to access 2,3-difunctionalized pyridines
作者:Ya-Zhou Liu、Yu Chen、Amu Wang、Zhongke Shen、Xueting Zhou、Jichao Zhang、Yinxiang Jian、Xiaofeng Ma
DOI:10.1039/d3gc04425d
日期:——
stoichiometric electron donor/acceptor is rare. Herein, we report such a process to access 2,3-difunctionalized pyridines from readily available N-aminopyridiniums (1) and activated alkenes (2) promoted by visible light. This procedure offered multi-substituted pyridines in satisfactory yields at room temperature with broad functional group tolerance. The reaction can be easily performed on a gram scale without
申请人:The Board of Regents of the Nevada System of Higher Education on Behalf of the University of Nevada, Las Vegas
公开号:US10633403B2
公开(公告)日:2020-04-28
Provided herein are N-heterocyclic phosphines (NHPs) useful in metal-free phosphorus-carbon bond forming reactions. Methods for preparing vinylphosphonates using NHPs also are provided. 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.