Ethylene Glycol → 2-(3-Methylthiophen-2-yl)-1,3-dioxolane
Reaktionsgleichung
[CH3:1][C:2]1[CH:6]=[CH:5][S:4][C:3]=1[CH:7]=[O:8].[CH2:9](O)[CH2:10][OH:11].C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1>[CH3:1][C:2]1[CH:6]=[CH:5][S:4][C:3]=1[CH:7]1[O:11][CH2:10][CH2:9][O:8]1Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
3-Methyl-2-thiophenecarboxaldehyde (12 g), 1,2-ethanediol (20 ml) and a trace of toluene-p-sulphonic acid were heated at reflux in toluene (250 ml) under Dean and Stark conditions for 4 h. The reaction mixture was cooled and washed with 5% aqueous sodium carbonate solution and water. The toluene solution was evaporated to give an oil which was distilled to give the title compound as a pale yellow oil (14.5 g) b.p. 95°/0.1 mm.
Aufarbeitung
- temperatureThe reaction mixture was cooled
- washwashed with 5% aqueous sodium carbonate solution and water
- customThe toluene solution was evaporated
- customto give an oil which
- distillationwas distilled
Quellen und Nachweise
- ORD-Eintrag
- ord-2026b163e94b4de39571e8771f45461e
- Quelldatensatz
- uspto-grants-1988_10
- Patentnummer
- US04777179
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