Copper-catalyzed decarboxylative coupling between α-oxocarboxylic acids and diphenyl disulfides or thiophenols is presented, which provided an effective and direct approach for the preparation of useful thioesters through C(sp2)–S bond formation.
Palladium-Catalyzed Desulfonative Carbonylation of Thiosulfonates: Elimination of SO<sub>2</sub> and Insertion of CO
作者:Jian-Xing Xu、Le-Cheng Wang、Xiao-Feng Wu
DOI:10.1021/acs.orglett.2c01951
日期:2022.7.8
A palladium-catalyzed desulfonative carbonylation of thiosulfonates has been explored. Without any additive, a series of S-aryl/alkyl benzenesulfonothioates were successfully transformed to thioesters in moderate to excellent yields by SO2 extrusion and CO insertion under the pressure of 1 bar of CO. The solvent dimethylacetamide (DMAc) facilitated this desulfonative carbonylation due to its high absorbing
已经探索了硫代磺酸盐的钯催化的脱磺羰基化。在不使用任何添加剂的情况下,在 1 bar CO 的压力下,通过 SO 2挤出和 CO 插入,一系列S-芳基/烷基苯硫代磺酸盐成功地转化为硫酯,产率适中。对SO 2的高吸收能力。
Boron‐Centered Lewis Superacid through Redox‐Active Ligands: Application in C−F and S−F Bond Activation
synthesis of strong boron-centered Lewis superacids. The Lewis superacids were characterized by NMR, XRD and FIA computation. The ferrocenium-substituted boranes were applied in catalytic C−F and S−F bondactivations.
二茂铁取代的硼烷和硼酸酯的氧化可以直接合成以硼为中心的强路易斯超强酸。路易斯超强酸通过 NMR、XRD 和 FIA 计算来表征。二茂铁取代的硼烷用于催化 C-F 和 S-F 键活化。
Photocatalytic Phosphine-Mediated Thioesterification of Carboxylic Acids with Disulfides
Herein, a practical and effective synthesis of thioesters from readily available carboxylic acids and odorless disulfides was developed under photocatalytic conditions. This approach involves phosphoranyl radical-mediated fragmentation to generate acyl radicals and allows for incorporation of both S atoms of the disulfides into the desired products. In addition to batch reactions, a continuous-flow