Heterocyclic polyfluoro-compounds. Part XV. Synthesis of tetrafluoropyridine-4-sulphonic acid and related sulphur-containing derivatives of pentafluoropyridine
作者:R. E. Banks、R. N. Haszeldine、D. R. Karsa、F. E. Rickett、I. M. Young
DOI:10.1039/j39690001660
日期:——
gives 4-cyano-2,3,5,6-tetrafluoropyridine. Treatment of 2,3,5,6-tetrafluoropyridine-4-thiol with pentafluoropyridine, cyanuric chloride, or performic acid yields bis-(2,3,5,6-tetrafluoropyridyl) sulphide, dichloro-s-triazinyl 2,3,5,6-tetrafluoropyridyl sulphide, and 2,3,5,6-tetrafluoropyridine-4-sulphonic acid, respectively. Oxidation of phenyl 2,3,5,6-tetrafluoropyridyl sulphide with hydrogen peroxide
五氟吡啶在非质子溶剂中与氢硫化钾,噻吩钾,苯磺酸钠或亚硫酸钠反应生成2,3,5,6-四氟吡啶-4-硫醇,苯基2,3,5,6-四氟吡啶硫,苯基2,3分别是,5,6-四氟吡啶基砜和2,3,5,6-四氟吡啶-4-磺酸。使2,3,5,6-四氟吡啶-4-磺酸钠与氰化钠在二甲基甲酰胺中反应,得到4-氰基-2,3,5,6-四氟吡啶。用五氟吡啶,氰尿酰氯或过甲酸处理2,3,5,6-四氟吡啶-4-硫醇可生成双-(2,3,5,6-四氟吡啶基)硫化物,二氯-s-三嗪基2,3,5分别是,6-6-四氟吡啶基硫化物和2,3,5,6-四氟吡啶-4-磺酸。2,3,5苯基的氧化 带有过氧化氢的6-四氟吡啶基硫化物产生苯基2,3,5,6-四氟吡啶基砜和相应的亚砜;当相应的硫化物用过氧三氟乙酸处理时,会生成双-(2,3,5,6-四氟吡啶基)亚砜和砜。通过用溴氧化母体硫醇得到的双(2,3,5,6-四氟吡啶基)二硫化物进行氯化,得到2