3,3-difluorooxane-2,6-dione

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 3 g of 2,2-difluoroglutaric anhydride in 25 ml of dry methanol is allowed to remain at 25° for 18 hrs. At the end of this period the methanol is removed in vacuo leaving behind 2,2-difluoroglutaric 1-methyl ester as an oil. At the end of this period the methanol is removed in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 5 g of 2,2-difluoroglutaric acid in 20 ml of acetic anhydride is refluxed for two hrs, 5 ml of the resulting solution is distilled off at ordinary pressure and the residual solution freed from acetic anhydride under reduced pressure. The resulting oil consists of 2,2-difluoroglutaric anhydride. 5 ml of the resulting solution is distilled off at ordinary pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 5 g of 2,2-difluoroglutaric acid in 20 ml of acetic anhydride is refluxed for two hrs, 5 ml of the resulting solution is distilled off at ordinary pressure and the residual solution freed from acetic anhydride under reduced pressure. The resulting oil consists of 2,2-difluoroglutaric anhydride. 5 ml of the resulting solution is distilled off at ordinary pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 3 g of 2,2-difluoroglutaric anhydride in 25 ml of dry methanol is allowed to remain at 25° for 18 hrs. At the end of this period the methanol is removed in vacuo leaving behind 2,2-difluoroglutaric 1-methyl ester as an oil. At the end of this period the methanol is removed in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 5 g of 2,2-difluoroglutaric acid in 20 ml of acetic anhydride is refluxed for two hrs, 5 ml of the resulting solution is distilled off at ordinary pressure and the residual solution freed from acetic anhydride under reduced pressure. The resulting oil consists of 2,2-difluoroglutaric anhydride. 5 ml of the resulting solution is distilled off at ordinary pressure