PROCESS FOR PRODUCTION OF HALOGENATED -FLUOROETHERS
申请人:Central Glass Company, Limited
公开号:EP2292579A1
公开(公告)日:2011-03-09
Halogenated α-fluoroethers (or bis-derivatives thereof) can be produced by reacting a halogenated hemiacetal (or bis-derivative thereof) with sulfuryl fluoride (SO2F2) in the presence of an organic base. The reaction is conducted preferably in the presence of "a salt or complex of an organic base with hydrogen fluoride", whereby the objective dehydroxyfluorination can proceed extremely favorably. It is still preferable to use as the starting substrate a halogenated hemiacetal prepared from fluoral or 3,3,3-trifluoropyruvic acid ester. Thus, industrially important halogenated α-fluoroethers can be industrially produced with high selectivity and in high yield.
Pasetti,A. et al., Gazzetta Chimica Italiana, 1968, vol. 98, p. 277 - 289
作者:Pasetti,A. et al.
DOI:——
日期:——
Process for Production of Halogenated alpha-Fluoroethers
申请人:Ishii Akihiro
公开号:US20110082313A1
公开(公告)日:2011-04-07
Halogenated α-fluoroethers (or bis-derivatives thereof) can be produced by reacting a halogenated hemiacetal (or bis-derivative thereof) with sulfuryl fluoride (S
2
F
2
) in the presence of an organic base. The reaction is conducted preferably in the presence of “a salt or complex of an organic base with hydrogen fluoride”, whereby the objective dehydroxyfluorination can proceed extremely favorably. It is still preferable to use as the starting substrate a halogenated hemiacetal prepared from fluoral or 3,3,3-trifluoropyruvic acid ester. Thus, industrially important halogenated α-fluoroethers can be industrially produced with high selectivity and in high yield.
US8304576B2
申请人:——
公开号:US8304576B2
公开(公告)日:2012-11-06
Synthesis of γ-pyrone precursors by condensation of acetyl ketene dithioacetals with ethyl polyfluorocarboxylates and diethyl oxalate
作者:Sergey A. Usachev、Vyacheslav Ya. Sosnovskikh
DOI:10.1007/s10593-017-2000-5
日期:2016.12
β-Dicarbonyl compounds with the ketene dithioacetyl fragment were obtained by condensation of acetyl ketene dithioacetals with ethyl polyfluorocarboxylates and diethyl oxalate in the presence of NaH in Et2O at room temperature in 65–94% yields. These compounds can be used for the synthesis of 6-polyfluoroalkyl(ethoxycarbonyl)-2-methylsulfanyl-4-pyrones.