Imidazole → 160701-58-6

To a solution of 3-hydroxyphenylacetic acid (1.5 g) in dimethylformamide (15 ml), 3.4 g of imidazole and 4.5 g of tert-butyldimethylchlorosilane was added, and the reaction solution was stirred overnight at room temperature. The reaction solution was diluted with water and extracted with ethyl acetate. The combined organic layers were washed with a saturated saline solution and then dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure to afford a crude product as a brown oil. To a solution of lithium aluminum hydride (748 mg) in tetrahydrofuran (10 ml), a solution of the crude product in tetrahydrofuran (5 ml) was added under ice-cooling, and the reaction solution was stirred at the same temperature for 1 hour. To the reaction solution was added sodium sulfate decahydrate, the mixture was stirred at the same temperature for further 1 hour and then Celite-filtered, and the filtrate was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate (98:2-50/50)) to afford the title compound as a yellow oil.

1. extractionextracted with ethyl acetate
2. washThe combined organic layers were washed with a saturated saline solution
3. dry with materialdried over anhydrous sodium sulfate
4. distillationThe solvent was distilled off under reduced pressure
5. customto afford a crude product as a brown oil
6. temperaturecooling
7. stirringthe reaction solution was stirred at the same temperature for 1 hour
8. stirringthe mixture was stirred at the same temperature for further 1 hour
9. filtrationCelite-filtered
10. distillationthe filtrate was distilled off under reduced pressure
11. customThe residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate (98:2-50/50))

ORD record

ord-ed42bda9a6a849db90c7f8ed87f4ee0d

Source dataset

uspto-grants-2013_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08367708B2