Hydrochloric Acid → 1-Oxo-1H-isothiochromene-3-carboxylic acid
Reaktionsgleichung
[C:1]([C:4]1[CH:17]=[CH:16][CH:15]=[CH:14][C:5]=1[CH:6]=[C:7]1[S:11]C(=S)N[C:8]1=[O:13])([OH:3])=O.[OH-:18].[Na+].Cl>O>[C:1]1([C:4]2[C:5](=[CH:14][CH:15]=[CH:16][CH:17]=2)[CH:6]=[C:7]([C:8]([OH:18])=[O:13])[S:11]1)=[O:3]Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 5-(o-carboxybenzylidene) rhodanine (4.68g.) and sodium hydroxide (5.0g.) in water (40ml.) was heated under reflux for 30 minutes, cooled and poured into 5N hydrochloric acid (250ml.). Filtration and recrystallization from ethanol-water gave the product as a white solid, mp. 260.5°-261° (lit mp. 261°-3°), (Found: C, 58.10; H, 2.92; S, 15.41. C10H6SO3 requires C, 58.24; H, 2.93; S, 15.55).
Aufarbeitung
- temperaturewas heated
- temperatureunder reflux for 30 minutes
- temperaturecooled
- filtrationFiltration and recrystallization from ethanol-water
Quellen und Nachweise
- ORD-Eintrag
- ord-f154320082ec44edb95874a7a5e9bb8b
- Quelldatensatz
- uspto-grants-1976_08
- Patentnummer
- US03975535
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