Silica chloride is used as a selective and effective heterogeneous catalyst for the rapid conversion of thiols to disulfides with quantitative yields in a very short period of time.
Oxidative Coupling of Thiols to Disulfides with Ti(IV) in the Presence of NaI under Air Atmosphere
作者:Behzad Zeynizadeh、Nasser Iranpoor
DOI:10.1002/jccs.200300118
日期:2003.8
Ti(IV) as TiCl3(O3SCF3) and TiO(O2CCF3)2 are used as efficient catalysts for oxidativecoupling of aliphatic, aromatic and heteroaromatic thiols to their disulfides in the presence of NaIunderairatmosphere.
Ti(IV) 作为 TiCl3(O3SCF3) 和 TiO(O2CCF3)2 被用作在空气气氛下在 NaI 存在下将脂肪族、芳香族和杂芳族硫醇氧化偶联为其二硫化物的有效催化剂。
Air Oxidative Coupling of Thiols to Disulfides Catalyzed by Fe(III)/NaI
作者:N. Iranpoor、B. Zeynizadeh
DOI:10.1055/s-1999-3693
日期:1999.1
A very simple and mild reaction is described for the efficient coupling of thiols at room temperature catalyzed by Fe(III)/NaI in the presence of air
Oxidation of thiols to disulfides with molecular bromine on hydrated silica gel support
作者:Mohammed Hashmat Ali、Mario McDermott
DOI:10.1016/s0040-4039(02)01220-0
日期:2002.8
Results of oxidation of thiols to disulfides with molecular bromine on silicagel solid support are reported. The procedure utilizes organic media and does not require a base to neutralize HBr by-products to suppress acid promoted side reactions. Utilization of silicagelsupport simplifies work up and product isolation.
thiols react smoothly with dialkyl dicyanofumarates in CH2Cl2 at room temperature to give the corresponding disulfides in excellent yields. Aliphatic 1,2-, 1,3-, and 1,4-dithiols afford cyclic disulfides. Analogous reaction courses were observed starting with selenols, and the required diselenides were also formed in nearly quantitative yields. In all of the reactions, dialkyl dicyanosuccinates formed