Urea → 1-(3-Methylphenyl)-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one
反応式
[C:1]1([CH3:16])[CH:6]=[CH:5][CH:4]=[C:3]([NH:7][C:8]2[C:13]([CH2:14][NH2:15])=[CH:12][CH:11]=[CH:10][N:9]=2)[CH:2]=1.N[C:18](N)=[O:19]>>[C:1]1([CH3:16])[CH:6]=[CH:5][CH:4]=[C:3]([N:7]2[C:8]3[N:9]=[CH:10][CH:11]=[CH:12][C:13]=3[CH2:14][NH:15][C:18]2=[O:19])[CH:2]=1参加物
3
反応条件
- 温度
- 180 °C
実験手順
To a mixture of 4.3 g 2-(m-toluidino)-3-aminomethylpyridine and 12 g of urea was heated at 180° C for 2 hours and further heated at 200° C for 30 minutes. After cooling, crude reaction product precipitated was collected by filtration and washed with sufficient amounts of warm water. This product was purified by recrystallization from methanol to give 2.6 g of 1-(m-tolyl)-2-oxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine as colorless prisms, melting at 212° - 214° C.
後処理
- temperaturefurther heated at 200° C for 30 minutes