Reactions of epoxides derived from internal perfluoroolefins with o-phenylenediamine and 2-aminophenol
作者:L. V. Saloutina、A. Ya. Zapevalov、V. I. Saloutin、M. I. Kodess、V. E. Kirichenko、M. G. Pervova、O. N. Chupakhin
DOI:10.1134/s1070428006040130
日期:2006.4
The reactions of epoxy derivatives of internal perfluoroolefins with o-phenylenediamine and 2-aminophenol in dioxane gave 23-67% of the corresponding 2,3-bis(perfluoroalkyl)quinoxalines and 2,3-bis(perfluoroalkyl)-2H-1,4-benzoxazin-2-ols, respectively. When N,N-dimethylacetamide was used as a solvent, the main reaction pathway was anionic isomerization of epoxides into ketones which were then converted into 2-perfluoroalkylbenzimidazoles (in the reactions with o-phenylenediamine) or 2-hydroxy-N-perfluoroalkanoyl-anilines (in the reactions with 2-aminophenol). The reaction of 3,4-epoxydodecafluorohexane with 2-aminophenol in N,N-dimethylacetamide was accompanied by unusual cyclization to afford 2-pentafluoropropanoyl-2pentafluoroethyl-1,3-benzoxazolidine.