Highly regio- and stereoselective hydrothiolation of acetylenes with thiols catalyzed by a well-defined supported Rh complex
作者:Yong Yang、Robert M. Rioux
DOI:10.1039/c1cc11605c
日期:——
Highlyregio- and stereoselective hydrothiolation of a wide range of alkynes with various thiols was demonstrated in the presence of a well-defined Rh complex supported on mesoporous SBA-15 silica. The catalyst was easily recovered and reused several times without significant loss of activity or selectivity.
A Simplified Protocol for the Stereospecific Nickel-Catalyzed C–S Vinylation Using NiX2 Salts and Alkyl Phosphites
作者:Austin D. Marchese、Bijan Mirabi、Egor M. Larin、Mark Lautens
DOI:10.1055/s-0039-1690717
日期:2020.1
A Ni-catalyzed C–S cross-coupling using only NiI2 (0.5–2.5 mol%) and P(OiPr)3 (2.0–10.0 mol%) is reported. Using an air-stable Ni(II) precatalyst, and a cheap and commercially available ligand, a scalable and robust method was developed to cross-couple various thiophenols and styryl bromides, including some sterically encumbered thiols, an α-bromocinnamaldehyde as well as a thiolation-cyclization.
据报道,仅使用NiI 2(0.5–2.5 mol%)和P(O i Pr)3(2.0–10.0 mol%)的Ni催化的C–S交叉偶联。使用空气稳定的Ni(II)预催化剂和便宜的市售配体,开发了一种可扩展且稳健的方法来交叉偶联各种硫酚和苯乙烯基溴化物,包括一些空间受限的硫醇,α-溴肉桂醛和硫醇化环化。
Amino acid and water-driven tunable green protocol to access S–S/C–S bonds via aerobic oxidative coupling and hydrothiolation
作者:Amit Shard、Rajesh Kumar、Saima Saima、Nidhi Sharma、Arun K. Sinha
DOI:10.1039/c4ra02909g
日期:——
Arginine in conjunction with water has been employed as an effective and recyclable organocatalyst for oxidative coupling of thiophenols and hydrothiolation of alkynes.
精氨酸与水结合被用作噻吩酚的氧化偶联和炔烃的氢硫化反应的有效可循环有机催化剂。
l-Proline promoted cross-coupling of vinyl bromide with thiols catalyzed by CuBr in ionic liquid
作者:Yunfa Zheng、Xingfen Du、Weiliang Bao
DOI:10.1016/j.tetlet.2005.11.164
日期:2006.2
the coupling of vinyl bromides with thiols using the copper(I) bromide as catalyst and l-proline as ligand was reported. The best yields were obtained in the ionic liquid [Bmim]BF4 with the retention of stereochemistry. This protocol is palladium-free, tolerates both aromatic and aliphatic thiols, possesses good selectivity between alcohol and thiol, and does not require the use of expensive or air-sensitive
subsequent hydrorhodation of alkynes to provide vinylrhodium intermediates (RCHCH−[Rh]−SAr). In contrast, PdCl2(PhCN)2-catalyzed hydrothiolation of aromatic alkynes (ArC⋮CH) takes place to give the corresponding Markovnikov adducts (R(ArS)CCH2) with excellent regioselectivity, probably via thiopalladation of alkynes by palladium sulfide species (ArS−[Pd]−Cl), which may be formed by ligand-exchange reaction