Trisulfur-Radical-Anion-Triggered C(sp<sup>2</sup>)–H Amination of Electron-Deficient Alkenes
作者:Khang X. Nguyen、Phuc H. Pham、Thao T. Nguyen、Chou-Hsun Yang、Hoai T. B. Pham、Tung T. Nguyen、Haobin Wang、Nam T. S. Phan
DOI:10.1021/acs.orglett.0c03846
日期:2020.12.18
A trisulfur-radical-anion (S3̇–)-triggered C(sp2)–Hamination of α,β-unsaturated carbonyl derivatives with simple amines has been demonstrated. This protocol provides convenient access to a variety of synthetically valuable N-unprotected and secondary β-enaminones with absolute Z selectivity and tertiary β-enaminones with E selectivity. Mechanistic probe and electronic structure theory calculations
Beta-diketones react with a variety of amines and aminoesters over clay K10 or silica under microwave irradiation in open vessels to give within a few minutes, the corresponding enaminoketones with good yields. According to the reaction conditions acylamines may also result.