Cross-coupling study of iodo/chloropyridines and 2-chloroquinoline with atom-economic triarylbismuth reagents under Pd-catalysis
摘要:
This study describes the palladium-catalyzed couplings of iodopyridines, chloropyridines, and chloroquinoline with atom-economic BiAr3 reagents in sub-stoichiometric loadings. Mono-arylations of iodo and chloropyridines produced arylpyridines in high yields. The couplings addressed with dihalopyridines have afforded chemo- and regio-selective coupling products. Arylations of 2-chloroquinoline with different triarylbismuth reagents demonstrated fruitful coupling reactivity under the established conditions. This sumptuous study demonstrates the remarkable cross-coupling reactivity of iodo/chloropyridines and chloroquinoline with triarylbismuth reagents. (C) 2014 Elsevier Ltd. All rights reserved.
Triarylbismuthanes as Threefold Aryl-Transfer Reagents in Regioselective Cross-Coupling Reactions with Bromopyridines and Quinolines
作者:Maddali L. N. Rao、Ritesh J. Dhanorkar
DOI:10.1002/ejoc.201402455
日期:2014.8
Cross-coupling studies using bromopyridines and bromoquinolines with triarylbismuths as threefold coupling reagents in substoichiometric amounts under Pd-catalysed conditions are disclosed. The reactivity was high with both mono- and dibromopyridyl substrates, and mono- and bis-couplings were carried out regioselectively. A library of monoaryl and diaryl pyridines was formed in high yields. A one-pot
[EN] ALKYLTHIAZOL CARBAMATE DERIVATIVES, PREPARATION THEREOF AND THERAPEUTIC USE THEREOF<br/>[FR] DERIVES DE CARBAMATES D'ALKYLTHIAZOLES, LEUR PREPARATION ET LEUR APPLICATION EN THERAPEUTIQUE
申请人:SANOFI AVENTIS
公开号:WO2010010288A2
公开(公告)日:2010-01-28
Composé répondant à la formule générale (I) : dans laquelle R2 représente un atome d'hydrogène, de fluor ou un groupe hydroxyle, cyano, trif luorométhyle, C1-6-alkyle, C1-6- alcoxy, NR8R9; n représente un nombre entier égal à 1, 2 ou 3 et m représente un nombre entier égal à 1 ou 2; A représente une liaison covalente ou un groupe C1-8-alkylène; R1 représente un groupe de type aryle ou hétéroaryle éventuellement substitué; R3 représente un atome d'hydrogène, de fluor, un groupe C1-6-alkyle ou un groupe trif luorométhyle; R4 représente un thiazole éventuellement substitué; à l'état de base ou de sel d'addition à un acide. Application en thérapeutique.
Cross-coupling study of iodo/chloropyridines and 2-chloroquinoline with atom-economic triarylbismuth reagents under Pd-catalysis
作者:Maddali L.N. Rao、Ritesh J. Dhanorkar
DOI:10.1016/j.tet.2014.11.036
日期:2015.1
This study describes the palladium-catalyzed couplings of iodopyridines, chloropyridines, and chloroquinoline with atom-economic BiAr3 reagents in sub-stoichiometric loadings. Mono-arylations of iodo and chloropyridines produced arylpyridines in high yields. The couplings addressed with dihalopyridines have afforded chemo- and regio-selective coupling products. Arylations of 2-chloroquinoline with different triarylbismuth reagents demonstrated fruitful coupling reactivity under the established conditions. This sumptuous study demonstrates the remarkable cross-coupling reactivity of iodo/chloropyridines and chloroquinoline with triarylbismuth reagents. (C) 2014 Elsevier Ltd. All rights reserved.