Ethyl 2-(3-formylphenoxy)acetate → HCID 178472964, Verbindung
Reaktionsgleichung
[CH:1]1([N:6]2[C:10]([NH2:11])=[C:9]([C:12]([NH2:14])=[O:13])[C:8]([CH2:15][CH3:16])=[N:7]2)[CH2:5][CH2:4][CH2:3][CH2:2]1.[CH2:17]([O:19][C:20]([CH2:22][O:23][C:24]1[CH:25]=[C:26]([CH:29]=[CH:30][CH:31]=1)[CH:27]=O)=[O:21])[CH3:18]>>[CH:1]1([N:6]2[C:10]3=[N:11][C:27]([C:26]4[CH:29]=[CH:30][CH:31]=[C:24]([O:23][CH2:22][C:20]([O:19][CH2:17][CH3:18])=[O:21])[CH:25]=4)=[N:14][C:12](=[O:13])[C:9]3=[C:8]([CH2:15][CH3:16])[NH:7]2)[CH2:2][CH2:3][CH2:4][CH2:5]1Komponenten
3
Reaktionsbedingungen
- Temperatur
- 160 °C
Versuchsvorschrift
A mixture of 1-cyclopentyl-3-ethyl-5-amino-1H-pyrazole-4-carboxamide (3.54 g, 15.95 mmol), 3-(ethoxycarbonylmethoxy) benzaldehyde (4.3 g) and xylenes (20 ml) was heated at 160° C. overnight. The reaction mixture was cooled to room temperature, a solid formed which was collected by filtration and washed with methanol and then ether. The product was recrystallized from acetonitrile to afford 2.48 g of 1-cyclopentyl-3-ethyl-6-[3-(ethoxycarbonylmethoxy)phenyl]pyrazolo[3,4-d]pyrimidin-4-one. An additional 0.3 g of product was also obtained from the recrystallization of the filtrate for a total of 2.78 g.