Palladium catalysed cross-coupling of (fluoroarene)tricarbonylchromium(0) complexes
作者:René Wilhelm、David A. Widdowson
DOI:10.1039/b006576p
日期:——
(Fluoroarene)tricarbonylchromium(0) complexes were found to undergo Suzuki and Stille cross-coupling reactions to form functionalised biaryl and styrene complexes in up to 87 and 52% yields, respectively. The Suzuki reactions were optimal with dipalladium tris(dibenzylideneacetone)–trimethylphosphine–caesium carbonate in DME at reflux. The Stille reactions were optimal with dipalladium tris(dibenzylideneacetone)–trimethylphosphine–caesium fluoride in DME at reflux and neither was adversely affected by a methoxy group on the complexed ring. The Suzuki reaction tolerated a chloro group on the arylboronic acid ring but not a bromo group.
Infrared and proton magnetic resonance spectra of π-complexes of substituted condensed hydrocarbons
作者:David A. Brown、J. R. Raju
DOI:10.1039/j19660001617
日期:——
The infrared and protonmagneticresonancespectra of a series of chromium tricarbonyl complexes of substituted benzenes, biphenyls, and phenanthrenes are discussed.
讨论了一系列取代苯,联苯和菲的三羰基铬三铬配合物的红外和质子磁共振光谱。
Synthetic applications of lithiated tricarbonyl-η<sup>6</sup>-arenechromium(0) complexes: copper and palladium catalysed substitutions
作者:Paul J. Beswick、Susan J. Leach、Nigel F. Masters、David A. Widdowson
DOI:10.1039/c39840000046
日期:——
Regioselectively lithiated tricarbonyl-η6- arenechromium(0) complexes can be acylated and allylated in high yield via the analogous arylcopper dimethyl sulphide complexes, and vinylated and arylated via palladiumcatalysed cross coupling of the arylcopper dimethyl sulphide complexes with vinyl and aryl halides.
The reaction of mono-Cr(CO)3 complexes of a number of aromatic compounds containing two arene groups with the Mn(CO)3+ transfer agent [(naphthaleneMn(CO)3]+ gave new Cr/Mn diarene heterobimetallic compounds, e.g., (OC)3Cr(η6-C6H5CHCHC6H5-η6)Mn(CO)3+. This and two others of these compounds were characterized by X-ray diffraction. The two metal carbonyl groups were found to be on the same face of the
Reductive elimination of dihydrogen from arenechromium dimers
作者:Thomas E. Bitterwolf
DOI:10.1016/s0022-328x(00)99831-0
日期:1983.8
Biphenylbis(chromiumdicarbonyl)-μ-bis(diphenylphosphido)methane and its arsenic analog have been prepared in good yield by UV irradiation of biphenylbis(chromium tricarbonyl) and bis(diphenylphosphido)methane or bis(diphenylarsino)methane in benzene. Addition of strong acid to these dinuclear compounds results in rapid dihydrogen evolution and subsequent decomposition of the oxidized chromium species