C−O coupling of Malonyl Peroxides with Enol Ethers
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[5+2] Cycloaddition: Non‐Rubottom Oxidation
作者:Vera A. Vil'、Evgenii S. Gorlov、Oleg V. Bityukov、Yana A. Barsegyan、Yulia E. Romanova、Valentina M. Merkulova、Alexander O. Terent'ev
DOI:10.1002/adsc.201900271
日期:2019.7.2
Malonyl peroxides act both as oxidants and reagents for C−O coupling in reactions with methyl and silyl enol ethers. In the proposed conditions, the oxidative C−O coupling of malonyl peroxides with enol ethers selectively proceeds, bypassing the traditional Rubottom hydroxylation of enol ethers by peroxides. It was observed that the oxidative [5+2] cycloaddition of malonyl peroxides and enol ethers
Hantzsch Ester-Mediated Photochemical Transformations in the Ketone Series: Remote C(sp<sup>3</sup>)–H Arylation and Cyclopentene Synthesis through Strain Release
作者:Jan Paternoga、Jonas Kühlborn、Nils Ole Rossdam、Till Opatz
DOI:10.1021/acs.joc.0c02591
日期:2021.2.19
A metal-free Hantzsch ester-mediated synthesis of cyclopentenylketones as well as γ-hetarylketones starting from ketocyclopropanes under eco-friendly conditions was developed. The versatility of the developed conditions is shown by reacting ketocyclopropanes in both a formal [3 + 2] cycloaddition with terminal alkynes (further investigated using theoretical calculations) and a radical C–C-coupling
Ti-Catalyzed Modular Ketone Synthesis from Carboxylic Derivatives and <i>gem</i>-Dihaloalkanes
作者:Jiabin Ni、Xiaowen Xia、Danyu Gu、Zhaobin Wang
DOI:10.1021/jacs.3c04009
日期:2023.7.12
Ketones are ubiquitous in organic synthesis. However, the general method to convert widely available carboxylic acids, unactivated esters, and amides into ketones remains elusive. Herein, we describe the Ti-catalyzed modular ketonesynthesisfrom carboxylic derivatives and easily accessed gem-dihaloalkanes. Notably, this protocol could achieve the direct catalytic olefination of carboxylic acids. This