Palladium-Catalyzed Multicomponent Synthesis of 2-Aryl-2-imidazolines from Aryl Halides and Diamines
作者:Joanna V. Geden、Alpa K. Pancholi、Michael Shipman
DOI:10.1021/jo400252n
日期:2013.4.19
An efficient palladium-catalyzed three-component reaction that combines aryl halides, isocyanides, and diamines provides access to 2-aryl-2-imidazolines in yields up to 96%. Through variation of the diamine component, the reaction can be extended to the synthesis of 2-aryl-1H-benzimidazoles and 2-aryl-1,4,5,6-tetrahydropyrimidines.
Aerobic oxidative dehydrogenation of coordinated imidazoline units of pincer ruthenium complex
A new pincer ruthenium complex (1; [RuL1(tpy)](PF6); L-1 = 1,3- di(2-imidazoline-2-yl) benzene, tpy = 2,2': 6',2 ''- terpyridine) having a kappa(NCN)-N-3 pincer ligand with two imidazoline units and related ruthenium complexes were synthesized and characterized. The imidazoline units of 1 were oxidized in air to give an imidazole-ligated pincer complex (2; [RuL2(tpy)](PF6); L-2 = 1,3- di(2-imidazolyl) benzene). Results of the H-1 NMR spectroscopic and cyclic voltammetric studies of the complexes indicate that the sigma-donor character of the pincer ligand of 1 induces the Ru-promoted oxidative dehydrogenation of coordinated imidazoline moieties to imidazole units with oxygen in air. (C) 2007 Elsevier B.V. All rights reserved.
Baker, Anthony T.; Singh, Pratibha; Vignevich, Valentina, Australian Journal of Chemistry, 1991, vol. 44, # 8, p. 1041 - 1048
作者:Baker, Anthony T.、Singh, Pratibha、Vignevich, Valentina
DOI:——
日期:——
Baker, Anthony T.; Craig, Donald C.; Singh, Pratibha, Australian Journal of Chemistry, 1991, vol. 44, p. 1659 - 1668
作者:Baker, Anthony T.、Craig, Donald C.、Singh, Pratibha