Ethylenebis( N -methylimidazolium) chlorochromate was prepared by addition of N -methylimidazole to 1,2-dibromoethane to form the corresponding dibromide salt and subsequent treatment of this salt with CrO3 in 6 N HCl solution. It is a stable yellow-orange solid, which oxidized thiols to the corresponding disulfides at room temperature. Selective oxidation of thiols in the presence of sulfides and
通过将 N- 甲基咪唑添加到1,2-二溴乙烷中形成相应的二溴化物盐,然后在6 N HCl溶液中用CrO 3处理该盐,制得亚乙基双( N- 甲基咪唑鎓)氯铬酸盐。它是稳定的橙黄色固体,在室温下可将硫醇氧化成相应的二硫化物。用该试剂还可以在硫化物和羟基存在下选择性氧化硫醇。
Highly Efficient Oxidative Coupling of Thiols and Oxidation of Sulfides in the Presence of MCM-41@Tryptophan-Cd and MCM-41@Tryptophan-Hg as Novel and Recoverable Nanocatalysts
stable nanocatalysts for Oxidation of sulfides to sulfoxides and oxidative coupling of thiols into their corresponding disulfides. These functionalized complexes were characterized by FT-IR spectroscopy, thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and N2 adsorption–desorption isotherms. The designed catalysts successfully oxidized a variety of sulfides and thiols with short reaction
摘要 通过将 Cd 或 Hg 配合物固定在 MCM-41 上合成了两种多相催化剂 MCM-41@Tryptophan-Cd 和 MCM-41@Tryptophan-Hg 作为新型、高效、可回收且稳定的纳米催化剂,用于硫化物氧化为亚砜和氧化反应。硫醇偶联成相应的二硫化物。这些功能化配合物通过 FT-IR 光谱、热重分析 (TGA)、粉末 X 射线衍射 (XRD) 和 N2 吸附-解吸等温线进行表征。所设计的催化剂在室温下以短反应时间以高产率成功氧化各种硫化物和硫醇,并在不显着损失其催化活性的情况下回收数次。图形摘要已提出在温和反应条件下合成固定在介孔 MCM-41 表面的 Cd 和 Hg 色氨酸复合物。在对这些催化剂进行表征后,研究了它们用于合成亚砜和二硫化物衍生物的催化活性。
1,3-Dibromo-5,5-Dimethylhydantoin [DBDMH] as an Efficient and Selective Agent for the Oxidation of Thiols to Disulfides in Solution or under Solvent-Free Conditions
作者:Ardeshir Khazaei、Mohammad Ali Zolfigol、Amin Rostami
DOI:10.1055/s-2004-834919
日期:——
A useful method for oxidation of various thiols to their corresponding disulfides with 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) in very short reaction times and mild conditions under both solution and solvent-free conditions is described.
Silica‐Supported <i>bis</i> (Trimethylsilyl) Chromate: Oxidation of Thiols to Their Corresponding Disulfides
作者:Majid M. Heravi、Fatemeh Derikvand、Hossein A. Oskooie、Rahim Hekmat Shoar、Mahmood Tajbakhsh
DOI:10.1080/00397910601039267
日期:2007.2.1
Abstract An efficient and convenient method for the oxidation of thiols mediated by silica‐supported bis (trimethylsilyl) chromate (BTSC) in acetonitrile is reported.
application as a volumetric reagent (8). Iodine monochloride (1) has also been used as an iodinating agent without involving a catalyst. It has two crystalline forms α and β that contain non-planar chains of ICl (1) molecules arranged in a zig-zag manner (9). This compound (1) has high vapor pressure and, similar to I2 molecules, evaporates easily. While it has been used frequently, there is some hazard while