Synthesis of β-Trifluoromethylated Ketones from Propargylic Alcohols by Visible Light Photoredox Catalysis
作者:Sehyun Park、Jung Min Joo、Eun Jin Cho
DOI:10.1002/ejoc.201500031
日期:2015.7
A practical method to access β-trifluoromethyl ketonesfrom readily available propargylicalcohols by visiblelight photocatalysis has been developed. Trifluoromethylation of propargylicalcohols with CF3I in the presence of Ru(bpy)3Cl2 as the photocatalyst followed by double-bond migration/keto-enol tautomerization provides β-trifluoromethyl ketones as the final product.
The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.
Boron trihalide-promoted ring-opening reactions of gem-difluorocyclopropyl ketones to give the corresponding β-trifluoromethyl ketones and β-halodifluoromethyl ketones were described. It was found that boron trihalides act as both Lewis acids and nucleophiles and the proximal bond prefers to cleave in this transformation.
Efficient Synthesis of β-CF<sub>3</sub>/SCF<sub>3</sub>-Substituted Carbonyls via Copper-Catalyzed Electrophilic Ring-Opening Cross-Coupling of Cyclopropanols
作者:Yong Li、Zhishi Ye、Tabitha M. Bellman、Teng Chi、Mingji Dai
DOI:10.1021/acs.orglett.5b00782
日期:2015.5.1
The first copper-catalyzed ring-opening electrophilic trifluoromethylation and trifluoromethylthiolation of cyclopropanols to form Csp3–CF3 and Csp3–SCF3 bonds have been realized. These transformations are efficient for the synthesis of β-CF3- and β-SCF3-substituted carbonyl compounds that are otherwise challenging to access. The reaction conditions are mild and tolerate a wide range of functional
Synthesis of β-CF3 Ketones through Copper/Silver Cocatalyzed Oxidative Coupling of Enol Acetates with ICH2CF3
作者:Wei Deng、Jiannan Xiang、Niannian Yi、Yi Xiong、De Chen、Sheng Zeng、Chaozhihui Cheng、Pengjie Wang
DOI:10.1055/s-0037-1610257
日期:2018.10
A simple method for the synthesis of β-CF3 ketones through copper/silver cocatalyzed oxidative coupling of enol acetates with ICH2CF3 has been developed. Enol acetates were chosen as the source of carbonyl group, giving the β-CF3 ketones in moderate yields. Control experiments imply that a radical process maybe involved in this reaction.