NFSI-catalyzed S S bond exchange reaction for the synthesis of unsymmetrical disulfides
作者:Mengjie Song、Qingyue Hu、Zheng-Yi Li、Xiaoqiang Sun、Ke Yang
DOI:10.1016/j.cclet.2021.12.073
日期:2022.9
The metal-free SS bond exchangereaction of symmetrical disulfides catalyzed by NFSI is described. This novel protocol provides a facile and efficient approach to accessing important unsymmetrical disulfides. Furthermore, this strategy could also be utilized in the late-stage functionalization of amino acids, drugs, and natural products. The broad substrate scope, good functional group tolerance and
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。
Direct methylthiolation of <i>C</i>-, <i>S</i>-, and <i>P</i>-nucleophiles with sodium <i>S</i>-methyl thiosulfate
作者:Fanmin Liu
DOI:10.1039/d2ob02056d
日期:——
A practical and efficient methylthiolation that employed the typical Bunte saltsodium S-methyl sulfothioate as the sulfur source was described. This reagent could react with a variety of compounds such as alkynes, 1,3-diketones, thiols, selenol and H-phosphine oxides, affording methylthiolated products in moderate to excellent yields. The advantages such as easy preparation, air- and moisture-stability
Electrochemical radical-mediated selective C(sp<sup>3</sup>)–S bond activation
作者:Yongli Li、Huamin Wang、Zhuning Wang、Hesham Alhumade、Zhiliang Huang、Aiwen Lei
DOI:10.1039/d2sc05507d
日期:——
SelectiveC(sp3)–S bond breaking and transformation remains a particularly important, yet challenging goal in synthetic chemistry. Over the past few decades, transition metal-catalyzed cross-coupling reactions through the cleavage of C(sp3)–S bonds provided a powerful platform for the construction of target molecules. In contrast, the selectiveactivation of widespread C(sp3)–S bonds is rarely studied