Regioselective Gold-Catalyzed Hydration of CF3- and SF5-alkynes
摘要:
The regioselective gold-catalyzed hydration of CF3- and SF5-alkynes is described. The corresponding trifluoromethylated and pentasulfanylated ketones are obtained in up to 91% yield as single regioisomers showcasing the use of CF3 and SF5 as highly efficient directing groups in this reaction. Notably, this transformation represents the first use of CF3- and SF5-alkynes in gold catalysis.
Oxidative trifluoromethylation and fluoroolefination of unactivated olefins
作者:Ye-bin Wu、Guo-ping Lu、Tao Yuan、Zhu-bing Xu、Li Wan、Chun Cai
DOI:10.1039/c6cc08178a
日期:——
The fluorine-containing organic compounds are becoming privileged in medicinal chemistry. Described herein is a mild and efficient method for the radical addition of olefins with TMSCF3 and TMSCF2R (R=COOEt or...
An economical approach to α‐CF3‐substituted ketones, which are important intermediates in synthetic and medicinal chemistry, employs olefins and the readily available Langlois reagent (CF3SO2Na). The reaction is operationally simple, proceeds at room temperature, and exhibits an excellent tolerance toward a wide variety of functional groups.
一种经济的方法,以α-CF 3 -取代的酮,这是在合成和药物化学的重要中间体,采用烯烃和容易得到的试剂朗格卢瓦(CF 3 SO 2 Na)的。该反应操作简单,在室温下进行,并且对多种官能团表现出优异的耐受性。
Generation of the CF3 radical from trifluoromethylsulfonium triflate and its trifluoromethylation of styrenes
The CF(3) radical was generated from the reaction of S-(trifluoromethyl)diphenylsulfonium triflate with Na(2)S(2)O(4) or HOCH(2)SO(2)Na under suitable conditions without further reduction. Based on this, a method for the synthesis of alpha-trifluoromethylated ketones has been successfully developed.
作者:Petr Novák、Anton Lishchynskyi、Vladimir V. Grushin
DOI:10.1021/ja307783w
日期:2012.10.3
The C-X bond (X = Br, Cl) of α-haloketones is smoothly trifluoromethylated with the fluoroform-derived CuCF(3) reagent recently developed in our laboratories. This is the first nucleophilic α-trifluoromethylation reaction of carbonyl compounds and a rare example of CF(3)-C(sp(3)) coupling. The transformation employs only low-cost chemicals and cleanly occurs in up to 99% yield at room temperature,
Synthesis of α‐Trifluoromethylated Ketones from Vinyl Triflates in the Absence of External Trifluoromethyl Sources
作者:Takuji Kawamoto、Rio Sasaki、Akio Kamimura
DOI:10.1002/anie.201608591
日期:2017.1.24
A novel method for the conversion of vinyl triflates into α‐trifluoromethylated ketones in the absence of external trifluoromethyl sources is described. This process accomplishes an efficient migration of the trifluoromethyl group of the triflate to the α‐position in the ketone through a radical process. The reaction proceeds by the addition of a trifluoromethyl radical to the vinyl triflate and subsequent