Mechanistic study of palladium catalyzed S–S and Se–Se bonds addition to alkynes
作者:Valentine P Ananikov、Michael A Kabeshov、Irina P Beletskaya、Grigory G Aleksandrov、Igor L Eremenko
DOI:10.1016/s0022-328x(03)00795-2
日期:2003.12
The mechanistic study of palladiumcatalyzed S–S and Se–Se bonds addition to alkynes revealed the involvement of dinuclear transition metal complexes in the catalytic cycle. Coordination of alkyne to dinuclear transition metal complex was found to be the rate determining step of the reaction. An unusual phosphine ligand effect increasing the yield of addition reaction was found in the studied system
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.
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作者:V. P. Ananikov
DOI:10.1023/a:1023884518502
日期:——
Highly Stereoselective One-Pot Procedure To Prepare Bis- and Tris-chalcogenide Alkenes via Addition of Disulfides and Diselenides to Terminal Alkynes
作者:Angélica Venturini Moro、Cristina W. Nogueira、Nilda B. V. Barbosa、Paulo Henrique Menezes、João Batista Teixeira da Rocha、Gilson Zeni
DOI:10.1021/jo050448o
日期:2005.6.1
conditions, and the addition of dichalcogenides to alkynes occurred stereoselectively to give exclusively the corresponding Z isomers. We observed that the selectivity control was governed by the effective participation of the hydroxyl group from propargyl alcohols. In addition, the bis-chalcogenide alkenes were exclusively obtained with propargyl alcohol having the acidic hydroxyl group proton. Conversely