bisthiolation of terminal alkynes, K2S (potassium sulfide) and diaryliodoniumsalts for the assembly of functionalized (Z)‐1,2‐bis(arylthio)alkene derivatives has been accomplished for the first time. This unique observation features a broad substrate scope, excellent functional‐group tolerance, and high regioselectivity. Especially, an arylthiolate anion from diaryliodoniumsalts and potassium sulfide
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.
Palladium-catalyzed activation of E-E and C-E bonds in diaryl dichalcogenides (E = S, Se) under microwave irradiation conditions
作者:V. P. Ananikov、N. V. Orlov、I. P. Beletskaya
DOI:10.1007/s11172-005-0292-6
日期:2005.3
The firstexample of palladium-catalyzed stereoselective addition of diphenyl disulfide and diphenyl diselenide to the triple bond of terminal alkynes under microwave irradiation conditions is described. It was found that both the element—element (E-E) and carbon—element bonds can be activated in the catalytic system studied. The products of both reactions were isolated in quantitative yields. According
描述了在微波辐射条件下钯催化的二苯基二硫醚和二苯基二硒化物立体选择性加成到末端炔烃的三键的第一个例子。发现元素-元素(EE)和碳-元素键都可以在所研究的催化体系中被激活。两种反应的产物均以定量产率分离。根据量子化学计算,反应机制涉及 EE 键与 Pd0 的氧化加成。根据微波功率和反应条件,下一阶段是与炔烃的反应或碳元素键活化。Ph2Se2与Pd0氧化加成的产物,即双核络合物[Pd2(SePh)4(PPh32],
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.
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