Cu-Mediated Trifluoromethylation of Aromatic α-Diazo Esters with the Yagupolskii-Umemoto Reagent
作者:Xiao-Qian Hu、Jia-Bin Han、Cheng-Pan Zhang
DOI:10.1002/ejoc.201601196
日期:2017.1.10
Reductive trifluoromethylation of aromatic α-diazo esters at roomtemperature with the Yagupolskii–Umemoto reagent [Ph2SCF3][OTf]; (2a)} in DMF in the presence of excess CuCl gave a variety of α-trifluoromethyl arylacetates in up to 93 % yield. The prior reaction of 2a with CuCl before the addition of the α-diazo esters was imperative for the conversion. This initial reaction might pregenerate the
F<sup>–</sup>-Free Deoxyhydrotrifluoromethylation of α-Keto Esters with Ph<sub>3</sub>P<sup>+</sup>CF<sub>2</sub>CO<sub>2</sub><sup>–</sup>: Synthesis of α–CF<sub>3</sub>-Substituted Esters
作者:Ying Zheng、Yimin Jia、Yuan Yuan、Zhong-Xing Jiang、Zhigang Yang
DOI:10.1021/acs.joc.0c01518
日期:2020.8.21
direct deoxyhydrotrifluoromethylation of α-keto esters with a difluoromethylating reagent has been achieved, in which the employment of water can promote the dissociation of the CF2 group to form a CF3 moiety, which provides the successful transformation. The current protocol demonstrates one of the most practical approaches to generate α-trifluoromethyl esters with a broad substrate scope and high functional
Efficient One Step Procedure for the Synthesis of α-Trifluoromethylated Arylacetates
作者:In Howa Jeong、Tae Won Park、Bum Tae Kim
DOI:10.1080/00397919808007172
日期:1998.6
The reaction of beta,beta-difluoro-alpha-trifluoromethylstyrene derivatives 1 with 3 equiv. of sodium methoxide in acetonitrile at 25 degrees C afforded alpha-trifluoromethylated arylacetates 3 in good yields.