An efficient Mn(III)-mediated coupling reaction of sodium sulfinates with nitro-olefins has been developed, this reaction proceeds in mild and open-flask conditions to afford (E)-vinylsulfones with high regioselectivities and in good to excellent yields. The control experiments revealed that this transformation could involve a radical process.
Aryldiazonium Salts and DABSO: A Versatile Combination for Three‐Component Sulfonylative Cross‐Coupling Reactions
作者:Pritha Das、Subhodeep Das、Ranjan Jana
DOI:10.1002/asia.202200085
日期:2022.6
A catalyzed synthesis of diarylsulfones with arylboronic acids and catalyst-free synthesis of arylvinyl and alkylvinyl sulfonesfromvinyl bronic acids or halides is reported.
报道了用芳基硼酸催化合成二芳基砜和由乙烯基溴酸或卤化物无催化剂合成芳基乙烯基和烷基乙烯基砜。
Multicomponent hydrosulfonylation of alkynes for the synthesis of vinyl sulfones
hydrosulfonylations of alkynes have provided straightforward strategies for the synthesis of vinyl sulfones, these methods still exhibit several drawbacks, such as the use of large amounts of transition metal catalysts or/and additional additives. Herein, we report an efficient and mild multicomponent reaction (MCR) for the preparation of vinyl sulfones achieved by carrying out hydrosulfonylation of alkynes with the
乙烯基砜是重要的结构基序,在生物医学领域具有广泛的应用。尽管炔烃的氢磺酰化为乙烯基砜的合成提供了简单的策略,但这些方法仍然表现出一些缺点,例如使用大量过渡金属催化剂或/和额外的添加剂。在此,我们报道了一种高效且温和的多组分反应(MCR),通过用相应的芳基重氮盐 K 2 S 2 O 5对炔烃进行氢磺酰化来制备乙烯基砜。和苯硫酚在室温下,无需任何金属催化剂或添加剂。该转化是苯硫酚作为氢源与乙烯基自由基反应的第一个例子,具有高化学选择性和步骤经济的优点。值得注意的是,该方法也适用于脂肪族炔烃,规避了现有方法的局限性,并且克级实验顺利进行,证明了该方法的实用性。
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。