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
New, General, and Practical Preparation of Methyl Ketones via the Direct Coupling of Amides with CH<sub>2</sub>Cl<sub>2</sub> Promoted by TiCl<sub>4</sub>/Mg
作者:Kuo-Wei Lin、Chi-Hui Tsai、I.-Lin Hsieh、Tu-Hsin Yan
DOI:10.1021/ol8004326
日期:2008.5.1
The direct coupling of a variety of amides with CH2Cl2 or CD2Cl2 promoted by TiCl4/Mg/THF provides an extremely simple, practical, selective, and efficient approach for the construction of methyl ketones. The efficiency and practicability of this chemistry is illustrated by the very simple synthesis of deuterated methyl ketones.