反应详情

To a suspension of 2-(hydroxymethyl)-5-({[4-(methoxy)phenyl]methyl}oxy)-4(1H)-pyrone (40 g, 153 mmol) in ethanol (105 mL) was added concentrated aqueous ammonia (295 mL) and refluxed for 18 hours. The mixture was cooled, then refrigerated for 3 hours, and cooled in an ice-bath for 45 minutes. The solid was filtered off, washed with cold ethanol, followed by cold petroleum ether and dried in vacuo to afford the product as brown solid (26.21 g, 66%).

1. temperaturerefluxed for 18 hours
2. temperatureThe mixture was cooled
3. temperaturecooled in an ice-bath for 45 minutes
4. filtrationThe solid was filtered off
5. washwashed with cold ethanol
6. customdried in vacuo