반응 #75485

반응 방정식

thionicotinamide

MeOH

pyridine

→

5-acetyl-4-methyl-2-(3-pyridyl)-thiazol

반응 조건

후처리

1. 1
   기타The solvent was evaporated
2. 2
   여과The resulting solid was filtered
3. 3
   세척washed with EtOAc/MeOH

실험 절차

A mixture of 5-chloro-pentadione (5.12 g, 38 mmol) and thionicotinamide (5.25 g, 38 mmol) in MeOH (10 mL) was treated with pyridine (3 mL). The reaction mixture was heated at 70-75° C. for 5 h. The solvent was evaporated. The resulting solid was filtered and washed with EtOAc/MeOH to afford 4.33 g 5-acetyl-4-methyl-2-(3-pyridyl)-thiazol as a yellow solid, which was subjected to the next reaction without further purification. A mixture of this material (2.0 g) and N,N-dimethylformamide dimethyl acetal (4 mL) was heated at 80° C. for 22 h. The reaction mixture was concentrated and then triturated with EtOAc/PE. The precipitates were collected and washed with EtOAc/PE to afford the title compound (2.05 g, 75%) as a grey solid.

출처