反应详情

To a 100 mL 3-neck round bottom flask equipped with a stir bar, condenser, and addition funnel was added 39 mL of dihydrofuran (FW 70.09, d=0.927), and 0.18 g of phenothiazine. Acrylic acid (19 mL, FW 72.06, d=1.05) was added dropwise slowly with stirring. A mild exotherm (55° C.) occurred. After cooling to room temperature, 0.415 g of poly(4-vinylpyridine hydrochloride) was added and the reaction was stirred overnight. The acid catalyst was then filtered off and 0.2 g each of calcium hydride and potassium carbonate was added to the filtrate. After removal of excess dihydrofuran on a rotovap, 10 mg of DPPH (2,2-diphenyl-1-picrylhydrazyl hydrate) was added and the slurry was vacuum distilled at 200 mtorr at 26° C. to give 26.0 g of 2-tetrahydrofuranyl acrylate.

1. customTo a 100 mL 3-neck round bottom flask equipped with a stir bar, condenser, and addition funnel
2. customA mild exotherm (55° C.)
3. stirringthe reaction was stirred overnight
4. filtrationThe acid catalyst was then filtered off
5. addition0.2 g each of calcium hydride and potassium carbonate was added to the filtrate
6. customAfter removal of excess dihydrofuran on a rotovap, 10 mg of DPPH (2,2-diphenyl-1-picrylhydrazyl hydrate)
7. additionwas added
8. distillationdistilled at 200 mtorr at 26° C.