C–N Coupling of Amides with Alcohols Catalyzed by N-Heterocyclic Carbene–Phosphine Iridium Complexes
作者:Sutthichat Kerdphon、Xu Quan、Vijay Singh Parihar、Pher G. Andersson
DOI:10.1021/acs.joc.5b01324
日期:2015.11.20
N-Heterocycliccarbene–phosphineiridiumcomplexes (NHC–Ir) were developed/found to be a highly reactive catalyst for N-monoalkylation of amides with alcohols via hydrogen transfer. The reaction produced the desired product in high isolated yields using a wide range of substrates with low catalyst loading and short reaction times.
the basis of the formation of 1,3-cyclooctadiene from the reaction mixture, we propose the following reaction mechanism for the intramolecular C−H activation: carboxylate-induced C−H bondactivation and subsequent pyridine- or carbene-directed C−H bond oxidative addition, followed by the isomerization of 1,5-cyclooctadiene and reaction with carboxylic acid produces (C∧C:)(N∧C:)Ir(OCOPh). The cyclometalated
An efficient copper-catalyzed N-arylation and N-heteroarylation reactions of imidazole, pyrrole, indole, pyrazole, and perimidine with aryl or heteroaryl halides using pyridine-functionalized 1,3-diketone as ligands have been investigated. The ligands bearing pyridyl and 1,3-diketone moieties. which may form chelated Cu(I) species, are inexpensive and readily available. The combination of CuI and 1,3-di(pyridin-2-yl)propane- 1-3-dione is very efficient for C-N coupling reactions to afford various N-arylated products in good to excellent yields. (c) 2008 Elsevier Ltd. All rights reserved.
Pozharskii, A. F.; Smirnova, L. P.; Klyuev, N. A., Journal of Organic Chemistry USSR (English Translation), 1984, vol. 20, # 7, p. 1427 - 1434
作者:Pozharskii, A. F.、Smirnova, L. P.、Klyuev, N. A.、Starshikov, N. M.
DOI:——
日期:——
STARSHIKOV N. M.; POZHARSKIJ A., XIMIYA GETEROTSIKL. SOEDIN., 1980, HO 1, 96-100