Unsymmetrical Disulfides Synthesis via Sulfenium Ion
作者:Amarchand Parida、Khokan Choudhuri、Prasenjit Mal
DOI:10.1002/asia.201900620
日期:2019.8
An umpolung approach for the synthesis of unsymmetrical disulfides via sulfenium ion is reported. In situ generated electrophilic sulfenium ion from electron‐rich thiols reacted with second thiols to yield unsymmetrical disulfides. Using an iodine catalyst and 4‐dimethylaminopyridine (DMAP)/water as promoter, the target syntheses were achieved in one pot under aerobic condition.
4′-Nitroarenesulphenanilides: Their use in the synthesis of unsymmetrical disulphides
作者:L. Benati、P.C. Montevecchi、P. Spagnolo
DOI:10.1016/s0040-4039(00)84361-0
日期:1986.1
The reaction of 4′-nitroarenesulphenanilides with thiols in the presence of boron trifluoride etherate can provide an effective route to unsymmetricaldisulphides.
Visible-Light-Induced Direct Thiolation at α-C(sp<sup>3</sup>)–H of Ethers with Disulfides Using Acridine Red as Photocatalyst
作者:Xianjin Zhu、Xiaoyu Xie、Pinhua Li、Jianqi Guo、Lei Wang
DOI:10.1021/acs.orglett.6b00304
日期:2016.4.1
α-arylthioethers through a visible-light-induced direct thiolation at α-C(sp3)–H of ethers with diaryldisulfides was developed using acridine red as a novel photocatalyst. The reactions occurred at ambient conditions and generated the corresponding products in good to excellent yields, ignoring steric effect of disulfides.
Transformation of arylboronic acids with sodium thiosulfate into organodisulfides catalyzed by a recyclable polyoxometalate-based Cr(<scp>iii</scp>) catalyst
toxic oxidants under harsh conditions. Here, we disclose a highly-efficient pathway in which disulfide is synthesized by organic boric acid and Na2S2O3 using the catalyst (NH4)3[CrMo6O18(OH)6], demonstrating a high activity and excellent selectivity. Various boric acid derivatives have been successfully transformed into the corresponding disulfides. Mechanistic insights have been furnished based on the
有机二硫化物代表了化学生物学、制药领域和工业中丰富的一类化合物。它们传统上是通过在有机配体负载的金属催化剂或有毒氧化剂的存在下在恶劣条件下氧化硫醇来合成的。在这里,我们公开了一种高效途径,其中使用催化剂 (NH 4 ) 3 [CrMo 6 O 18 (OH) 6由有机硼酸和 Na 2 S 2 O 3合成二硫化物],显示出高活性和出色的选择性。各种硼酸衍生物已成功转化为相应的二硫化物。基于对中间和控制实验的观察提供了机械见解。
An (NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-promoted cross-coupling of thiols/diselenides and sulfoxides for the synthesis of unsymmetrical disulfides/selenosulfides
An (NH4)2S2O8-promoted cross-coupling of thiols/diselenides and sulfoxides to construct unsymmetrical disulfides/selenosulfides is disclosed. Control experiments demonstrate that (NH4)2S2O8 acts as an acid and an oxidant, while both ionic and radical routes are involved in the reaction. The KIE experiments reveal that C–H bond cleavage of sulfoxides was involved in the turnover-limiting step.
公开了一种(NH 4 ) 2 S 2 O 8促进的硫醇/二硒化物和亚砜的交叉偶联以构建不对称的二硫化物/硒硫化物。对照实验表明,(NH 4 ) 2 S 2 O 8充当酸和氧化剂,而离子和自由基途径都参与反应。KIE 实验表明,亚砜的 C-H 键断裂参与了周转限制步骤。