Metal-free in situ sp3, sp2, and sp C–H functionalization and oxidative cross coupling with benzamidines hydrochloride: a promising approach for the synthesis of α-ketoimides
Oxidative iodination of carbonyl compounds using ammonium iodide and oxone®
作者:Mahender Reddy Marri、Arun Kumar Macharla、Swamy Peraka、Narender Nama
DOI:10.1016/j.tetlet.2011.09.106
日期:2011.12
A simple, efficient, mild, and regioselective method for oxyiodination of carbonyl compounds has been reported by using NH4I as the source of iodine and Oxone® as an oxidant. Various carbonyl compounds such as aralkyl ketones, aliphatic ketones (acyclic and cyclic), and β-keto esters proceeded to the respective α-monoiodinated products in moderate to excellent yields. Unsymmetrical aliphatic ketones
Metal-free hydration of aromatic haloalkynes to α-halomethyl ketones
作者:Min Ye、Yuelu Wen、Huifang Li、Yejuan Fu、Qinghao Wang
DOI:10.1016/j.tetlet.2016.09.088
日期:2016.11
A highly regioselective and efficient metal-free hydration of aromatic haloalkynes to α-halomethyl ketones using cheap tetrafluoroboric acid as catalyst is described. The protocol is conducted under convenient conditions and affords products in good to excellent yields, with broad substrate scope, including a variety of aromatic alkynyl chlorides, alkynyl bromides, and alkynyl iodides.
The reaction of aromatic acetyl derivatives with potassium iodide and potassium iodate in acetic acid in the presence of sulfuric acid at room temperature gave iodoacethyl derivatives in good yields.
A multipathway coupled domino strategy has been developed for the efficient synthesis of 2-acylbenzothiazoles from multiform substrates arylethenes, arylacetylenes, 2-hydroxy-aromatic ketones, and carbinols via four distinct pathways. Through a logical coupled oxidation/heterocyclization domino process, a variety of 2-acylbenzothiazoles were synthesized free of metal in one pot.
Au(I)‐Catalyzed Hydration of 1‐Iodoalkynes Leading to α‐Iodoketones
作者:Alberto Gómez‐Herrera、Ishfaq Ibni Hashim、Marre Porré、Fady Nahra、Catherine S. J. Cazin
DOI:10.1002/ejoc.202001238
日期:2020.11.22
The Au(I)‐catalyzedhydration of 1‐iodoalkynes is reported, using a gold(I)–NHC catalyst. A variety of α‐iodomethyl ketones are thus accessed in good to excellent yields. Several sequential protocols were also developed, leading to the construction of molecular complexity.