Ammonium iodide-induced sulfonylation of alkenes with DMSO and water toward the synthesis of vinyl methyl sulfones
作者:Xiaofang Gao、Xiaojun Pan、Jian Gao、Huawen Huang、Gaoqing Yuan、Yingwei Li
DOI:10.1039/c4cc07606k
日期:——
A novel ammonium iodide-induced sulfonylation of alkenes with DMSO and water toward the synthesis of vinyl methylsulfones is described. The process proceeded smoothly under metal-free conditions with high stereoselectivity and good functional group tolerance. The reaction mechanism was revealed to proceed through a domino reaction of oxidation and elimination after the radical addition to alkenes
Stereoselective Synthesis of Alkenyl Silanes, Sulfones, Phosphine Oxides, and Nitroolefins by Radical C–S Bond Cleavage of Arylalkenyl Sulfides
作者:Ya-mei Lin、Guo-ping Lu、Rong-kang Wang、Wen-bin Yi
DOI:10.1021/acs.orglett.7b00126
日期:2017.3.3
has been introduced for the C–S bond activation of arylalkenyl sulfides. The protocol provides an efficient approach for the generation of various alkenes including alkenyl silanes, sulfones, phosphineoxides, and nitroolefins. In most cases, these radical substitutions are performed under metal-free conditions with stereospecificity.
methylsulfonylation of alkenes using inorganic sodium metabisulfite as the sulfurdioxide surrogate is described. This method provides convenient access to (E)-2-methyl styrenyl sulfones in good yields. In general, the in situ generated methyl radical from di-tert-butyl peroxide undergoes a methylsulfonylation process with the combination of sulfurdioxide.
EDA mediated S–N bond coupling of nitroarenes and sodium sulfinate salts
作者:Juan D. Lasso、Durbis J. Castillo-Pazos、Malcolm Sim、Joaquín Barroso-Flores、Chao-Jun Li
DOI:10.1039/d2sc06087f
日期:——
Despite their long-known photochemical properties and their industrial value, the use of nitroarenes as a productive photochemical handle in organic synthesis has remained relatively unexplored. More specifically, the photochemical formation of nitrogen-sulfur bonds from nitroarenes remains to be demonstrated. Herein, we report the design and application of a sulfinate–nitroarene electron donor–acceptor
TBAI-Mediated Cyclization and Methylsulfonylation of Propargylic Amides with Dimethyl Sulfite
作者:Jia-Qing Zhuang、Ying-Qiong Guo、Chen-Liang Deng、Xing-Guo Zhang、Hai-Yong Tu
DOI:10.1021/acs.joc.3c00785
日期:2023.8.4
A tetramethylammonium iodide (TBAI)-mediated cyclization and methylsulfonylation of propargylicamides enabled by dimethyl sulfite as a SO2 surrogate and methyl source have been developed. The transition metal-free and oxidant-free reaction provides a practical and efficient approach for the selective synthesis of methylsulfonyl oxazoles in moderate to excellent yields with good functional group compatibility
已经开发出四甲基碘化铵 (TBAI) 介导的炔丙酰胺环化和甲基磺酰化,通过亚硫酸二甲酯作为 SO 2替代物和甲基源实现。无过渡金属和无氧化剂的反应为选择性合成甲磺酰恶唑提供了一种实用且有效的方法,具有中等至优异的产率和良好的官能团相容性。