Synthesis of 2-Substituted 6-Fluoroalkylpyrimidin-4(3H)-ones and -pyrimidines
作者:Hui-Ping Guan、Qiao-Sheng Hu、Chang-Ming Hu
DOI:10.1055/s-1996-4327
日期:1996.8
Treatment of ethyl α-fluoroalkylacetates 1 or ethyl 3-fluoroalkyl-2-iodoacrylates 2 under mild conditions with amidine affords 2-substituted 6-fluoroalkylpyrimidin-4(3H)-ones 4, 5, 6, 7 in excellent yields, while α-fluoroalkyl alkyl ketones or α-fluoroalkyl aldehyde 3 give polysubstituted 6-fluoroalkylpyrimidines 8, 9 under the same conditions.
One Pot Synthesis of Fluoroalkyl Pyrimidines from α-Fluoroalkyl Carbonyl Compounds, Orthoesters and Ammonium Carbonate
作者:Bing-Hao Luo、Hui-Ping Guan、Chang-Ming Hu
DOI:10.1055/s-1997-1031
日期:1997.11
Fluoroalkyl pyrimidines have been synthesized from one pot reaction of α-fluoroalkyl carbonyl compounds, orthoesters and ammonium carbonate. The possible reaction pathway is suggested.
氟烷基嘧啶是由δ-氟烷基羰基化合物、原生酯和碳酸铵的一锅反应合成的。提出了可能的反应途径。
An Effective Synthesis of 2-Trifluoromethyl- or 2-(1,1-Difluoroalkyl)thiophenes
作者:Hui-Ping Guan、Bing-Hao Luo、Chang-Ming Hu
DOI:10.1055/s-1997-1204
日期:1997.4
Various thiophenecarboxylates carrying a 2-trifluoromethyl, 2-(1,1-difluoroalkyl) or 2-polyfluoroalkyl group are synthesized conveniently from reaction of α-fluoroalkyl ketones 1, aldehydes 2 or ethyl α-fluoroalkylacetates 3 with methyl (or ethyl) 2-sulfanylacetates 4. A possible reaction pathway is suggested.
Reaction of Active Methylene Compounds with α-Fluoroalkyl Ketones or Esters: A Convenient Synthesis of 4-Trifluoromethylpyridines and meta-Trifluoromethylphenols
作者:Hui-Ping Guan、Chang-Ming Hu
DOI:10.1055/s-1996-4393
日期:1996.11
The reaction of α-fluoroalkyl ketones 1 or ethyl α-fluoroalkylacetates 2 with active methylene compounds such as methyl acetoacetate (3), acetylacetone (4) and diethyl malonate (5) produced unsaturated fluoroalkyl-containing 1,5-dicarbonyl compounds 6, from which polyalkyl-substituted 4-trifluoromethylpyridines 7, 4-trifluoromethylpryrid-2(1H)-ones 8 and meta-trifluoromethylphenols 9 were synthesized conveniently.