The polymer-supported recyclable palladium catalyst was prepared for stereoselective diaryl disulphides addition to terminal alkynes with high yields. The 96-98% product purity was achieved after filtering the polymer-supported catalyst without special purification procedure.
Solvent-free palladium-catalyzed addition of diaryl dichalcogenides to alkynes
作者:V. P. Ananikov、I. P. Beletskaya
DOI:10.1023/b:rucb.0000035637.57608.51
日期:2004.3
Solvent-free palladium-catalyzed addition of diaryl disulfides and diselenides to terminal alkynes makes it possible to achieve high stereoselectivity and almost 100% yields in approximate to10 min using only 0.1 mol.% catalyst. Both Pd(PPh3)(4) and easily available Pd(OAc)(2) and PdCl2 can be used in the reaction with an excess of triphenylphosphine. The catalyst and triphenylphosphine are readily recycled for repeated use. The study of the mechanism of the solvent-free catalytic reaction indicates that the process involves binuclear palladium complexes.
Addition of diaryl disulfides to terminal alkynes catalysed by an MCM-41-supported bidentate phosphine palladium(0) complex
作者:Jianying Li、Jun Liu、Mingzhong Cai
DOI:10.3184/030823409x12526892025829
日期:2009.10
2-bis(arylthio)-substituted alkenes have been conveniently synthesised in high yields by the stereoselective addition of diaryl disulfides to terminal alkynes catalysed by an MCM-41-supported bidentate phosphinepalladium(0) complex. This polymeric palladium catalyst can be recovered and reused many times without any loss of activity.