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Synthesis of vinyl sulfones through sulfonylation of styrenes with sulfonyl chlorides under metal-free conditions
作者:Xia Wang、Bo Hu、Peng Yang、Qian Zhang、Dong Li
DOI:10.1016/j.tet.2020.131082
日期:2020.4
sulfonylation of styrenes with sulfonyl chlorides was developed for the synthesis of vinyl sulfones. The reaction proceeded under metal-free, mild and neutral conditions without extra oxidants or bases. It also exhibited good air and moisture tolerance, broad substrate scope and high chemo-selectivity, affording the vinyl sulfones in moderate to good yields.
The Synthesis of (<i>E)‐</i>Vinyl and Alkynyl Sulfones by the Formation of an Electron Donor‐Acceptor Complex Using Thiosulfonates and Sodium Iodide Under Visible Light
作者:Kun Cao、Naiyou Zhang、Li Lin、Qing Shen、Hezhong Jiang、Jiahong Li
DOI:10.1002/adsc.202300991
日期:2024.1.30
A method for the synthesis of (E)-vinyl sulfones and alkynyl sulfones through the cleavage of thiosulfonate promoted by the formation of EDA complexes under visible light irradiation at room temperature without the need for other metal catalysts is described. The mechanism study shows that sodium iodide and thiosulfonate form EDA complexes under visible light irradiation, resulting in a single-electron
描述了一种在室温下可见光照射下通过形成EDA络合物促进硫代磺酸盐裂解合成( E )-乙烯基砜和炔基砜的方法,而不需要其他金属催化剂。机理研究表明,碘化钠和硫代磺酸盐在可见光照射下形成EDA络合物,导致单电子转移裂解生成磺酰自由基,然后与烯烃或炔烃反应,分别生成(E)-乙烯基砜或炔基砜。该方法适用于44种烯烃和炔烃底物,收率范围为38%~90%,为磺酰化化合物的制备提供了一种自由基合成途径。