反应详情

To a solution of 400 mg of 5,6-diphenyl-2-(5-hydroxy-1-pentyn-1-yl)pyrazine in 20 ml of ethanol, 80 mg of 5% palladium-carbon was added and the mixture was hydrogenated at 30° C. for 5 hours. After 40 mg of 5% palladium-carbon was further added, hydrogenation was continued for one hour. The catalyst was removed by filtering the reaction solution through celite and the filtrate was dried over anhydrous magnesium sulfate, and then the solvent was evaporated under reduced pressure to obtain 398 mg of the desired compound as a yellow oily substance.

1. waithydrogenation was continued for one hour
2. customThe catalyst was removed
3. filtrationby filtering the reaction solution through celite
4. dry with materialthe filtrate was dried over anhydrous magnesium sulfate
5. customthe solvent was evaporated under reduced pressure