A simple synthesis of functionalized 3-methyl-1-pyridinyl-1H-imidazolium salts as bidentate N-heterocyclic-carbene precursors and their application in Ir-catalyzed arene borylation
摘要:
The selective alkylation of functionalized 2-(1H-imidazol-1-yl)pyridines 1 furnishes 3-methyl-1-pyridinyl-1H-imidazolium salts 2, which can be deprotonated to deliver strongly electron-donating bidentate N-heterocyclic carbene ligands (NHC). The synthesis of these ligands and their application in the iridium-catalyzed C H activated borylation of arenes with its current scope and limitations are reported. (C) 2010 Elsevier Ltd. All rights reserved.
A highly regioselective reaction of<i>N</i>-fluoropyridinium salts with stabilized sulfur, oxygen, and nitrogen nucleophiles: A convenient route to 2-substituted pyridines
作者:Alexander S. Kiselyov、Lucjan Strekowski
DOI:10.1002/jhet.5570300530
日期:1993.10
2-Substitutedpyridines are efficiently obtained by the reactions of N-fluoropyridinium tetrafluoroborate or triflate with anions derived from benzenethiols, phenols, azoles, cyanamide, and with azide anion. The results are consistent with a nucleophile addition at the position 2 of the N-fluoropyridinium cation as the major reaction pathway.
Facile and scalable preparation of 2-imidazolylpyridines
作者:Andreas Raba、Markus R. Anneser、Dominik Jantke、Mirza Cokoja、Wolfgang A. Herrmann、Fritz E. Kühn
DOI:10.1016/j.tetlet.2013.04.060
日期:2013.6
A novel method for the synthesis of 2-imidazolylpyridines is presented. The reaction of 2-halopyridines, potassium carbonate, and imidazole at high temperatures under inert gas atmosphere leads exclusively to the formation of 2-imidazolylpyridines in high yields. The synthesis is scalable, comparatively inexpensive, and the products are easily isolable. (c) 2013 Elsevier Ltd. All rights reserved.
SUNDBERG R. J.; MENTA D. C.; YILMAZ I.; GUPTA G., J. HETEROCYCL. CHEM. <JHTC-AD>, 1977, 14, NO 7, 1279-1281
作者:SUNDBERG R. J.、 MENTA D. C.、 YILMAZ I.、 GUPTA G.
DOI:——
日期:——
EMITTING COMPLEX FOR ELECTROLUMINESCENT DEVICES
申请人:Ren Xiaofan
公开号:US20100052516A1
公开(公告)日:2010-03-04
An OLED device including a cathode, an anode, and having therebetween a phosphorescent light-emitting layer that contains a light-emitting organometallic complex including a precious metal, a first ligand including an imidazole group and a second nitrogen heterocycle group, and at least one second different ligand.