HCID 73796369, Verbindung → 5-Oxo-5H-chromeno[2,3-B]pyridine-7-carbonitrile
Reaktionsgleichung
[O:1]=[C:2]1[C:11]2[C:6](=[N:7][CH:8]=[CH:9][CH:10]=2)[O:5][C:4]2[CH:12]=[CH:13][C:14]([CH:16]=[N:17]O)=[CH:15][C:3]1=2>C(OC(=O)C)(=O)C>[O:1]=[C:2]1[C:11]2[C:6](=[N:7][CH:8]=[CH:9][CH:10]=2)[O:5][C:4]2[CH:12]=[CH:13][C:14]([C:16]#[N:17])=[CH:15][C:3]1=2Komponenten
3
Edukt 1
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 25 g of 5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-7-carbaldehyde oxime and 150 ml of acetic anhydride is stirred under reflux for 24 hours. After cooling, the crystals are filtered off, washed with water, dried, and recrystallized from dimethylformamide to give 5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-7-carbonitrile melting at 260°C.
Aufarbeitung
- temperatureunder reflux for 24 hours
- temperatureAfter cooling
- filtrationthe crystals are filtered off
- washwashed with water
- customdried
- customrecrystallized from dimethylformamide
Quellen und Nachweise
- ORD-Eintrag
- ord-0400201aed50485d8dc96749cdd9fc34
- Quelldatensatz
- uspto-grants-1976_01
- Patentnummer
- US03931199
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