Heteroarylation of Sulfenate Ions In Situ Generated from β-Sulfinyl Esters under Transition-Metal-Free Conditions
作者:Fathima Pilathottathil、Sreelakshmi Unnikrishnan、Alagiri Kaliyamoorthy
DOI:10.1021/acs.joc.2c02153
日期:2022.11.4
Heteroaryl sulfoxides are an integral part of several bioactive molecules and pharmaceuticals. We have described a transition-metal-free route for the direct sulfinylation of 2-halobenzothiazoles and 2-halobenzimidazoles using β-sulfinyl esters as the source of the sulfenate ion in the presence of a Brønsted base such as LiOtBu, and the corresponding heteroaryl sulfoxides were isolated in yields of
杂芳基亚砜是多种生物活性分子和药物的组成部分。我们已经描述了一种无过渡金属的路线,用于在 Brønsted 碱如 LiO t Bu 存在的情况下,使用 β-亚磺酰酯作为亚磺酸根离子源,直接亚磺酰化 2-卤代苯并噻唑和 2-卤代苯并咪唑,以及相应的杂芳基亚砜的分离率为 30% 至 94%。此外,我们假设了一种似是而非的协同亲核芳香取代 (cS N Ar) 途径,用于将亚磺酰基官能团直接掺入 2-卤代杂芳烃中。