The nitration and bromination of 2-(pentafluorosulfanyl)-1,3-benzothiazole and 2-(trifluoromethyl)-1,3-benzothiazole
作者:Olexandr I. Guzyr、Lyudmila M. Potikha、Svitlana V. Shishkina、Volodymyr N. Fetyukhin、Yuriy G. Shermolovich
DOI:10.1007/s10593-023-03197-9
日期:2023.5
The nitration and halogenation reactions of 2-(pentafluorosulfanyl)- and 2-(trifluoromethyl)-1,3-benzothiazoles were studied. Methods for the preparation of previously undescribed mononitro-substituted 1,3-benzothiazoles (4-nitro-2-(pentafluorosulfanyl)-1,3-benzothiazole, 4-nitro-2-(trifluoromethyl)-1,3-benzothiazole, and 6-nitro-2-(pentafluorosulfanyl)-1,3-benzothiazole) as well as a new method for
研究了2-(五氟硫基)-和2-(三氟甲基)-1,3-苯并噻唑的硝化和卤化反应。先前未描述的单硝基取代的1,3-苯并噻唑(4-硝基-2-(五氟硫基)-1,3-苯并噻唑、4-硝基-2-(三氟甲基)-1,3-苯并噻唑和6的制备方法开发了一种合成先前已知的 6-硝基-2-(三氟甲基)-1,3-苯并噻唑的新方法。该过程涉及2-(三氟甲基)-1,3-苯并噻唑与NH 4 NO 3在TFAA中在室温下的反应。基于2-取代1,3-苯并噻唑与NBS在TFA-H中反应制备2-取代4,5,6,7-四溴-1,3-苯并噻唑的有效方法提出了室温下的2 SO 4 。