Reaction of perfluorinated and partially fluorinated olefins with fluorinated thioketones. Efficient synthesis of perfluorinated 1,3-dithioles
作者:Viacheslav Petrov
DOI:10.1016/j.jfluchem.2021.109775
日期:2021.8
process. The reaction of RfCF=CHRf, sulfur, 2,2,4,4-tetrakis(trifluoromethyl)-dithietane-1,3 and an excess of CsF (or KF) resulted in selective formation of previously unknown perfluorinated 2,2-bis(trifluoromethyl)-1,3-dithioles in 47–74 % yield. Surprisingly, even 2,3-H-hexafluorobutene-2 was active in this reaction resulting in selective formation of the corresponding 2,2,4,5-(tetrakis)trifluoromethyldithiole-1
F-丁烯-2和F-戊烯-2与硫,CsF催化剂和2,2,4,4-四(三氟甲基)-二硫杂环丁烷1,3在室温下的反应产生了等摩尔的相应全氟化混合物发现1,3-二硫醇和支链全氟化多硫化物可通过在该方法中使用一氢氟代烯烃来避免形成不希望的多硫化物。R f CF = CHR f的反应,硫,2,2,4,4-四(三氟甲基)-二硫杂环丁烷-1,3和过量的CsF(或KF)导致选择性形成先前未知的全氟2,2-双(三氟甲基)-1,3 -二硫键,产率47-74%。出乎意料的是,甚至2,3-H-六氟丁烯-2在该反应中也具有活性,导致选择性形成相应的2,2,4,5-(四)三氟甲基二硫醇-1,3。