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
This paper describes an enantioselective intermolecular allylicaminationcatalyzed by a chiral Brønsted acid via a possible chiral contact ion pair intermediate. A variety of symmetrical or unsymmetrical allylic alcohols can be smoothly aminated to afford the desired products in moderate to high yields with good enantioselectivities and/or regioselectivities.
Chalcone derivative compounds represented by general formula (I) or (II), wherein R₁ and R₂ each represents a halogen atom, a hydroxy group, an amino group, a dimethylamino group, a nitro group, a cyano group, a phenyl group, an acetyl group, an alkyl group containing 1 to 18 carbon atoms or an alkyloxy group containing 1 to 22 carbon atoms, n₁ and n₂ each represents an integer of 0 to 21, and m₁ and m₂ each represents an integer of 0 to 5.