通过镍催化,开发了含有高对映选择性的1,1-二芳基叔碳中心的手性SR f (SCF 3 、SC 2 F 5 、SC 3 F 7 、SC 4 F 9和SCF 2 CO 2 Et)的结构不对称根岸偶联反应。该策略的合成效用在克级反应中得到证明,并且通过引入SCF 3基团合成生物活性化合物的光学类似物,而对映选择性没有明显降低。
An efficient and practical approach to trifluoromethylthiolation of α-haloketones/α-haloarylmethanes
作者:Min Jiang、Fangxia Zhu、Haoyue Xiang、Xing Xu、Lianfu Deng、Chunhao Yang
DOI:10.1039/c5ob00858a
日期:——
An efficient and practical approach to the trifluoromethylthiolation of α-haloketones/α-haloarylmethanes was developed, providing an unprecedentedly easy entry to various α-SCF3-substituted ketones/arylmethanes.
straightforward synthesis of alkyltrifluoromethyl thioethers was developed that starts from widely available alkyl halides or mesylates and the inexpensive reagents sodium thiocyanate and trimethyl(trifluoromethyl)silane. The alkyl electrophiles are converted in situ into the corresponding thiocyanates, which react with the nucleophilic Ruppert–Prakash reagent to give the corresponding trifluoromethyl thioethers
Ph3P+CF2CO2− as an F− and :CF2 source for trifluoromethylthiolation of alkyl halides
作者:Zhuo Liu、Jin Long、Xuan Xiao、Jin-Hong Lin、Xing Zheng、Ji-Chang Xiao、Yu-Cai Cao
DOI:10.1016/j.cclet.2018.11.013
日期:2019.3
As trifluoromethylthiolation has received increasing attention recently, many CF3S-reagents and trifluoromethylthiolation methods have been developed. Herein we describe trifluoromethylthiolation of alkyl halides by using Ph3P+CF2CO2 as a fluoride and difluorocarbene source. Difluorocarbene is a versatile intermediate, but its side reactions are usually ignored and the by-products would therefore be discarded. In this work, a side reaction of difluorocarbene, the generation of a fluoride anion from difluorocarbene, was developed into a synthetic tool. Although the trifluoromethylthiolation reaction involved multi-sequential steps, the cleavage of C-F bond, the formation of CF2=S bond, F-C(S)F-2 bond, and C-SCF3 bond, the conversion proceeded fast and was completed within 10 min. (C) 2018 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
Room temperature nucleophilic trifluoromethylthiolation of benzyl bromides with (bpy)Cu(SCF3)
The nudeophilic trifluoromethylthiolation of benzyl bromides using (bpy)Cu(SCF3) gave the desired products of benzyl trifluoromethyl sulfides in good to excellent yields. A diverse set of important functional groups including cyano, nitro, ester, alkoxy, halide, and heterocyclic groups can be well tolerated in the protocol. (C) 2013 Elsevier Ltd. All rights reserved.
TRIFLUORO METHYLTHIOMETHYL BENZENE DERIVATIVES AND PROCESS FOR PRODUCING THE SAME