Three-Component Photoredox-Mediated Chloro-, Bromo-, or Iodotrifluoromethylation of Alkenes
摘要:
A mild and simple three-component procedure for the direct vicinal halotrifluoromethylation of styrenes and aliphatic alkenes has been developed in the presence of [Ru(bpy)(3)](PF6)(2) as a photosensitizer and Umemoto's reagent as the CF3 source. The multicomponent method offers the advantage of short reaction time, moderate to good yields, and mild reaction conditions.
Iron-Mediated Chlorotrifluoromethylation of Alkenes with Sodium Trifluoromethanesulfinate
作者:Bin Yang、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1002/cjoc.201500641
日期:2016.5
An iron‐mediated three‐component chlorotrifluoromethylation of both styrenes and aliphatic alkenes has been presented here. This reaction employs ferric chloride (FeCl3) as the Cl source and the Langlois reagent (CF3SO2Na) as the CF3 source. It provides a convenient pathway towards a wide range of chlorotrifluoromethylated compounds.
本文介绍了铁介导的苯乙烯和脂族烯烃的三组分三氟氯甲基化反应。该反应使用氯化铁(FeCl 3)作为Cl源,使用Langlois试剂(CF 3 SO 2 Na)作为CF 3源。它为广泛的三氟氯甲基化化合物的制备提供了便利的途径。
Cu Photoredox Catalysts Supported by a 4,6-Disubstituted 2,2′-Bipyridine Ligand: Application in Chlorotrifluoromethylation of Alkenes
作者:Murat Alkan-Zambada、Xile Hu
DOI:10.1021/acs.organomet.8b00585
日期:2018.11.12
exhibit longer excited state lifetimes and higher Cu(I)/Cu(II) potentials compared to the most widely used Cucatalyst, [Cu(dap)2]Cl. The complex with Xantphos as the P^P ligand is an efficientcatalyst for chlorotrifluoromethylation of terminal alkenes, especially styrenes, which had been challenging substrates for previously reported photoredoxreactions. This chlorotrifluoromethylation method enables
Anodically Coupled Electrolysis for the Heterodifunctionalization of Alkenes
作者:Ke-Yin Ye、Gisselle Pombar、Niankai Fu、Gregory S. Sauer、Ivan Keresztes、Song Lin
DOI:10.1021/jacs.7b13387
日期:2018.2.21
Herein, we discuss the strategic use of anodically coupled electrolysis, an electrochemical process that combines two parallel oxidative events, as a complementary approach to existing methods for redox organic transformations. Specifically, we demonstrate anodically coupled electrolysis in the regio- and chemoselective chlorotrifluoromethylation of alkenes.
Reaction of trifluoromethanesulphonyl chloride with alkenes catalysed by a ruthenium(II) complex
作者:Nobumasa Kamigata、Takamasa Fukushima、Masato Yoshida
DOI:10.1039/c39890001559
日期:——
The reaction of trifluoromethanesulphonylchloride with alkenes in the presence of dichlorotris(triphenylphosphine)ruthenium(II) gives 1:1 adducts with extrusion of sulphur dioxide.
l hydrazides as trifluoromethylating agents has been demonstrated in two vicinal difunctionalization reactions of terminal alkenes: the copper-catalyzed three-component vicinal chlorotrifluoromethylation of arylakenes with TfNHNHBoc and NaCl and the tandem trifluoromethylation/cyclization of N-arylacrylamides with TfNHNHBoc. The reactions proceeded in the presence of inexpensive oxidants under mild