反应详情

To a solution of (4-carboxy-3-fluorobenzyl)(triphenyl)phosphoniumbromide (2.037 g, 4.112 mmol) and N-(4-formyl-1,3-thiazol-2-yl)acetamide (599.5 mg, 3.523 mmol) in anhydrous N,N-dimethylformamide (15 ml) was added potassium tert-butoxide (1.180 g, 10.52 mmol), and the mixture was stirred at room temperature for 3 hr. Water (150 ml) was added to the reaction mixture, and the mixture was washed 3 times with ethyl acetate. While stirring, 1M hydrochloric acid (10.5 ml) was added to the aqueous layer. The precipitated solid was collected by filtration and washed with water. The solid was dried under reduced pressure to give 4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]vinyl}-2-fluorobenzoic acid (753.9 mg, 2.461 mmol, yield 69.9%) as a yellow solid.

1. washthe mixture was washed 3 times with ethyl acetate
2. stirringWhile stirring
3. addition1M hydrochloric acid (10.5 ml) was added to the aqueous layer
4. filtrationThe precipitated solid was collected by filtration
5. washwashed with water
6. customThe solid was dried under reduced pressure