Lithium benzenechromiumtricarbonyl as C-nucleophile in the cross-dehydrogenative coupling reactions of azaaromatics
摘要:
Direct, non-catalyzed by transition metals, the oxidative cross-dehydrogenative coupling reactions (CDC) of azines with lithium benzenechromiumtricarbonyl has been developed. A series of previously unknown benzenechromiumtricarbonyl derivatives of azines, as well as intermediates of these reactions, have been obtained and characterized by NMR and X-ray analysis.
Syntheses of Ortho-Mercurated and -Palladated (η<sup>6</sup>-Arene)tricarbonylchromium Complexes
作者:Alexsandro Berger、André de Cian、Jean-Pierre Djukic、Jean Fischer、Michel Pfeffer
DOI:10.1021/om010152i
日期:2001.7.1
that the “symmetrization” reaction occurred with retention of the configuration of the mercury-bound ipso carbon atom. The trimetallic and bimetallic mercurated (η6-arene)Cr(CO)3 complexes were readily converted into cyclopalladated binuclear complexes upon transmetalation with Pd(II) salts. The structures of two ortho-mercurated compounds and two ortho-palladated complexes are reported.
Chloride-Promoted Synthesis of Cis Bis-Chelated Palladium(II) Complexes from Ortho-Mercurated Tricarbonyl(η<sup>6</sup>-arene)chromium Complexes
作者:Alexsandro Berger、Jean-Pierre Djukic、Michel Pfeffer、Jérôme Lacour、Laurent Vial、André de Cian、Nathalie Kyritsakas-Gruber
DOI:10.1021/om030433l
日期:2003.12.1
(η6-arene)Cr(CO)3 complexes. The study of the mechanism of this transmetalation reaction reveals the key role of the excess of chloride salt, which is necessary for the isolation of persistent heteroleptic bis-chelated Pd(II) complexes. This method was further applied to the synthesis of highly enantioenriched (+) and (−) samples of the ortho-chloropalladated 2-[tricarbonyl(η6-phenyl)chromium]pyridine, whose
Stoichiometric C–H arylation of tricarbonyl(arene)chromium complexes bearing pyridine directing groups
作者:Matthew J. Fuchter、Dilraj K. Judge、Marko Weimar、Andrew J. P. White
DOI:10.1039/c3dt50187f
日期:——
Differentially substituted Cr(CO)3-complexed aryl pyridines have been shown to readily undergo stoichiometric palladation and subsequent arylation using boronic acid nucleophiles. The positioning of the aryl substituents has been shown to be key in governing substrate reactivity, whereby sterically congested compounds prevent the geometry required for cyclometallation.
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.
Cyclomanganated (η6-arene)tricarbonylchromium complexes: synthesis and reactivity
作者:Jean-Pierre Djukic、Aline Maisse、Michel Pfeffer
DOI:10.1016/s0022-328x(98)00669-x
日期:1998.9
The cyclomanganation of (η6-arene)tricarbonylchromiumcomplexes by reaction with benzylpentacarbonylmanganese affords new bimetallic compounds. The mechanism of the manganation as well as other underlying aspects of the reactivity of cyclomanganated complexes are addressed in this report.
(的cyclomanganation η 6 -arene)tricarbonylchromium络合物通过与benzylpentacarbonylmanganese得到新的双金属化合物反应。本报告探讨了锰的机理以及环化锰配合物反应性的其他潜在方面。