Ionic Reactivity of 2-Isocyanoaryl Thioethers: Access to 2-Halo and 2-Aminobenzothia/Selenazoles
作者:Jinhuan Dong、Junlin Hu、Xiaoli Liu、Shaoguang Sun、Lan Bao、Mengying Jia、Xianxiu Xu
DOI:10.1021/acs.joc.1c02747
日期:2022.3.4
An ionic cascade insertion/cyclization reaction of thia-/selena-functionalized arylisocyanides has been successfully developed for the efficient and practical synthesis of 2-halobenzothiazole/benzoselenazole derivatives. This synthetic protocol, incorporating a halogen atom when forming the five-membered ring of benzothia/selenazoles, is different from the existing ones, where halogenation of the preformed
已成功开发了硫杂/硒官能化芳基异氰化物的离子级联插入/环化反应,用于高效、实用地合成 2-卤代苯并噻唑/苯并硒唑衍生物。这种合成方案在形成苯并噻吩/硒唑的五元环时加入了一个卤素原子,与现有的方案不同,其中发生了预先形成的苯并噻吩/硒唑前体的卤化。此外,还可以通过 2-异氰基芳基硫醚、碘和胺的一锅级联反应轻松获得 2-氨基苯并噻唑。