Pyridine → HCID 19978206, compound

Participants

Reaction Conditions

Reaction Steps

In the mixture of 30 ml of pyridine and 3 ml of dimethylformamide was suspended 938 mg of 3-propyl-6,7-dihydro-5H-thiazolo[3,2-a]pyrimidine-2-carbonylchloride hydrochloride (described in Example 13). To the suspension was added 587 mg of N-methyl-3,5-dichloroaniline, and 40 mg of dimethylaminopyridine, followed by stirring at 70° C. for 18 hours. The reaction mixture was cocentrated and to the mixture was added water. The organic layer was extracted with chloroform. The extact was washed with 5% sodium hydrogencarbonate aqueous solution and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure. The residue was dissolved in ethanol. To the solution was added saturated hydrogenchloride diethylether solution. The mixture was stirred at room temperature, followed by removing the solvent under reduced pressure. The residue was purified by column chromatography (silica gel: 45 g) using a mixed solvent of chloroform and methanol (20:1 by volume) as an eluent. The resulting substance was treated with saturated hydrogenchloride diethylether solution and recrystallized from a mixed solvent of ethanol and diethylether to obtain 461 mg of the titled compound.

Provenance & Evidence