Catalytic <i>O</i>
- to <i>N</i>
-Alkyl Migratory Rearrangement: Transition Metal-Free Direct and Tandem Routes to <i>N</i>
-Alkylated Pyridones and Benzothiazolones
作者:Abhishek Kumar Mishra、Nelson Henrique Morgon、Suparna Sanyal、Aguinaldo Robinson de Souza、Srijit Biswas
DOI:10.1002/adsc.201800664
日期:2018.10.18
The present study reports the synthesis of N‐alkylated pyridones and benzothiazolones via O‐ to N‐alkyl group migration under transition metal‐free TfOH‐catalyzed reaction conditions for the first time, to the best of our knowledge. Primary as well as secondary alkyl groups smoothly migrate under the present reaction conditions. Moreover, a minor modification of the protocol used in this study is found
据我们所知,本研究首次报道了在无过渡金属的TfOH催化的反应条件下,通过O到N烷基的迁移合成了N烷基化的吡啶酮和苯并噻唑酮。在当前反应条件下,伯烷基和仲烷基均平稳地迁移。此外,发现对本研究中所用方案的微小修改适用于2烷氧基N的全新串联合成在无溶剂的反应条件下,由最简单的起始原料形成杂环。密度泛函理论(DFT)计算可确定与重排有关的能量种类,而机械实验则探索了催化剂作为烷基转移介体的作用。