A heterobimetallic complex featuring a Ti–Co multiple bond and its application to the reductive coupling of ketones to alkenes
作者:Bing Wu、Mark W. Bezpalko、Bruce M. Foxman、Christine M. Thomas
DOI:10.1039/c4sc03772c
日期:——
To explore metal–metalmultiplebonds between first row transition metals, Ti/Co complexes supported by two phosphinoamide ligands have been synthesized and characterized. The Ti metalloligand Cl2Ti(XylNPiPr2)2 (1) was treated with CoI2 under reducing conditions, permitting isolation of the Ti/Co complex [(μ-Cl)Ti(XylNPiPr2)2CoI]2 (2). One electron reduction of complex 2 affords ClTi(XylNPiPr2)2CoPMe3
Nickel-Catalyzed Three-Component Domino Reactions of Aryl Grignard Reagents, Alkynes, and Aryl Halides Producing Tetrasubstituted Alkenes
作者:Fei Xue、Jin Zhao、T. S. Andy Hor、Tamio Hayashi
DOI:10.1021/ja513166w
日期:2015.3.11
Three-component reaction of aryl Grignardreagents, alkynes, and aryl halides in the presence of 1 mol % of NiCl2 proceeded sequentially through carbomagnesiation of the alkyne followed by cross-coupling of the resulting alkenyl Grignardreagent with aryl halide to give tetrasubstituted alkenes in high yields.
Efficient Palladium-Catalyzed Double Arylation of Phosphonoalkynes and Diarylalkynes in Water: Use of a Dinuclear Palladium(I) Catalyst
作者:K. V. Sajna、Venu Srinivas、K. C. Kumara Swamy
DOI:10.1002/adsc.201000579
日期:2010.11.22
A novel use of the dinuclearpalladium(I) catalyst [(OCH2CMe2CH2O)P-S-Pd(PPh3)]2 in aqueous medium for the doublearylation of phosphonoalkynes as well as diarylalkynes is reported. This doublearylation requires both the iodoarene and arylboronic acid along with the catalyst. The structures of some key products have been proven by X-ray crystallography.