Efficient Generation of C-S Bonds<i>via</i>a By-Product-Promoted Selective Coupling of Alcohols, Organic Halides, and Thiourea
作者:Xiantao Ma、Lei Yu、Chenliang Su、Yaqi Yang、Huan Li、Qing Xu
DOI:10.1002/adsc.201700227
日期:2017.5.17
alcohols, heteroaryl halides, and thiourea has been developed for direct and selective synthesis of heteroaryl thioethers. This method can be easily scaled up to the gram scale and extended to dialkyl thioethers, heteroaryl selenides, benzothiazoles, and some antimycobacterially‐active thioethers. Mechanistic studies revealed that a by‐product‐promoted in situ C–O activation of alcohols to more reactive
醇,杂芳基卤化物和硫脲的无金属和无碱三组分偶联已被开发用于直接和选择性地合成杂芳基硫醚。此方法可以轻松扩展至克级,并扩展到二烷基硫醚,杂芳基硒化物,苯并噻唑和一些抗分枝杆菌活性的硫醚。机理研究表明,副产物促进了醇的原位C-O活化,使其反应性更高的烷基卤化物以及硫醇和烷基卤化物中间体的缓慢释放是反应高选择性和成功的关键。