A general and convenient copper-mediated trifluoromethylthiolation of primary and secondary alkyl halides was described. Variation of the solvent, additives and time allowed optimization of the reaction. A wide range of alkyl halides were explored to give a set of alkyl trifluoromethyl thioethers in moderate to excellent yields. A variety of functional groups, including ethers, thioether, esters, nitriles, amides, and ketal groups, were well tolerated in the electrophilic partner.
Difluorocarbene‐Derived Trifluoromethylthiolation and [
<sup>18</sup>
F]Trifluoromethylthiolation of Aliphatic Electrophiles
作者:Jian Zheng、Lu Wang、Jin‐Hong Lin、Ji‐Chang Xiao、Steven H. Liang
DOI:10.1002/anie.201505446
日期:2015.11.2
The first trifluoromethylthiolation and [18F]trifluoromethylthiolation of alkyl electrophiles with in situ generated difluorocarbene in the presence of elemental sulfur and external (radioactive) fluoride ion is described. This transition‐metal‐free approach is high yielding, compatible with a variety of functional groups, and operated under mild reaction conditions. The conceptual advantage of this
A silver‐catalyzed decarboxylative trifluoromethylthiolation of secondary and tertiary carboxylic acids under mild conditions tolerates a wide range of functional groups. The reaction was dramatically accelerated by its performance in an aqueous emulsion, which was formed by the addition of sodium dodecyl sulfate to water. It was proposed that the radical, which was generated from the silver‐catalyzed
Nucleophilic Trifluoromethylthiolation of Alkyl Chlorides, Bromides and Tosylates
作者:Chunfa Xu、Qingyun Chen、Qilong Shen
DOI:10.1002/cjoc.201500905
日期:2016.5
A direct nucleophilic trifluoromethylthiolation of alkyl chlorides, bromides and tosylates with AgSCF3 was described. It was found that the presence of nBu4NI or a combination of nBu4NI/nBu4NBr significantly enhanced the reaction rates. The reaction conditions were mild, thus allowing the tolerance of a variety of functional groups.
描述了用AgSCF 3烷基氯,溴化物和甲苯磺酸酯的直接亲核三氟甲基硫醇化。发现存在n Bu 4 NI或n Bu 4 NI / n Bu 4 NBr的组合显着提高了反应速率。反应条件温和,因此允许各种官能团的耐受性。