Potassium Carbonate → 1-Chloro-3-ethynylbenzene
Reaktionsgleichung
[Cl:1][C:2]1[CH:3]=[C:4]([C:8]#[C:9]C(C)(O)C)[CH:5]=[CH:6][CH:7]=1.C(=O)([O-])[O-].[K+].[K+].C1OCCOCCOCCOCCOCCOC1>C1(C)C=CC=CC=1>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([C:8]#[CH:9])[CH:3]=1Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 90 °C
Versuchsvorschrift
Add dry toluene to a degassed mixture of 4-(3-chlorophenyl)-2-methylbut-3-yn-2-ol (21.1 g, 0.109 mol), potassium carbonate (45 g, 0.326 mol) and 18-crown-6 (6.89 g, 0.026 mol). Stir at 90° C. for 36 h. Cool the reaction mixture to room temperature, filter and wash with toluene. Concentrate and purify the residue by silica gel chromatography, eluting with 18:1 o 13:1 hexanes:ethyl acetate, to give the title compound (9.85 g, 66%).
Aufarbeitung
- temperatureCool the reaction mixture to room temperature
- filtrationfilter
- washwash with toluene
- concentrationConcentrate
- custompurify the residue by silica gel chromatography
- washeluting with 18:1 o 13:1 hexanes
Quellen und Nachweise
- ORD-Eintrag
- ord-b46969bcf8b0465daccdc5e39da688a3
- Quelldatensatz
- uspto-grants-2011_03
- Patentnummer
- US07915424B2
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