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...
A Concise and Efficient Approach to 2,6-Disubstituted 4-Fluoropyrimidines from α-CF3 Aryl Ketones
作者:Fangran Liu、Xiaofei Zhang、Qun Qian、Chunhao Yang
DOI:10.1055/s-0039-1690248
日期:2020.1
Herein, a concise and efficient protocol to synthesize a series of 2,6-disubstituted 4-fluoropyrimidines as universal and useful building blocks in medicinal chemistry is reported. From readily accessible α-CF3 aryl ketones and different amidine hydrochlorides, this method provides a very practical approach to this kind of compounds under mild conditions with good to excellent yields.
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。
Radical Desulfur‐Fragmentation and Reconstruction of Enol Triflates: Facile Access to α‐Trifluoromethyl Ketones
作者:Xiaolong Su、Honggui Huang、Yaofeng Yuan、Yi Li
DOI:10.1002/anie.201608507
日期:2017.1.24
efficient oxidative radical desulfur‐fragmentation and reconstruction of enoltriflates for the synthesis of α‐CF3 ketones. Preliminary mechanistic studies disclosed that oxidative fragmentation to release a CF3 radical from the triflyl group of enoltriflate and subsequent addition of the CF3 radical to another enoltriflate form the desired α‐CF3 ketones. This method provides a new approach to α‐CF3
Photoredox Catalysis: A Mild, Operationally Simple Approach to the Synthesis of α-Trifluoromethyl Carbonyl Compounds
作者:Phong V. Pham、David A. Nagib、David W. C. MacMillan
DOI:10.1002/anie.201101861
日期:2011.6.27
A facile and efficient method for the α‐trifluoromethylation of carbonylcompounds and enolsilanes has been accomplished through application of a photoredox catalysis strategy. A one‐flask procedure for the direct α‐trifluoromethylation and α‐perfluoroalkylation of ketone, amide, and ester substrates as well as silylketene acetals is described (see scheme).