Thiazole → 5-(4-Fluorophenyl)thiazole

Temperature

145 °C

To a sealed tube containing a solution of thiazole (2 g, 23.53 mmol) in DMA (10 mL) was added potassium acetate (6.9 g, 70.58 mmol), 1-fluoro-4-iodobenzene (15.6 g, 70.58 mmol), and palladium hydroxide\C (0.53 g, 2.35 mmol) under nitrogen. The reaction mixture was heated to 145° C. and stirred for 16 h. The reaction mixture was cooled to room temperature and diluted with water (200 mL), filtered through Celite® reagent, and extracted with ethyl acetate (300 mL). The organic layer was dried over sodium sulfate, filtered and concentrated under reduced pressure to obtain crude product. The crude product was purified by column chromatography (100-200μ silica gel, eluting with 10% EtOAc and hexane) to afford 5-(4-fluorophenyl)thiazole (0.9 g, 22%). 1H NMR (400 MHz, CDCl3): δ 8.74 (s, 1H), 8.01 (s, 1H), 7.55 (t, 2H), 7.11 (t, 2H).

1. temperatureThe reaction mixture was cooled to room temperature
2. filtrationfiltered through Celite® reagent
3. extractionextracted with ethyl acetate (300 mL)
4. dry with materialThe organic layer was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customto obtain crude product
8. customThe crude product was purified by column chromatography (100-200μ silica gel, eluting with 10% EtOAc and hexane)

ORD record

ord-66fbb199022d4c85808e4acb7ca3c409

Source dataset

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09266873B2