Dimethylformamide → 3-Chloro-5-methylthiophene-2-carbonyl chloride
Reaktionsgleichung
[C:1]([C:4]1[S:5][C:6]([CH3:10])=[CH:7][C:8]=1[Cl:9])(O)=[O:2].C(Cl)(=O)C([Cl:14])=O.CN(C=O)C>C(Cl)Cl>[Cl:14][C:1]([C:4]1[S:5][C:6]([CH3:10])=[CH:7][C:8]=1[Cl:9])=[O:2]Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a suspension of 2-carboxy-3-chloro-5-methylthiophene (1.2 g, 6.6 mmol) in methylene chloride (16 mL) at 0° C. were added oxalyl chloride (0.6 mL, 7.3 mmol) and a drop of DMF. The mixture was stirred at ambient temperature for 5 hours, then concentrated of all volatiles and dried in vacuo to afford 1.3 g (quantitative yield) of 2-chlorocarbonyl-3-chloro-5-methylthiophene as a pale yellow solid; NMR (DMSO-d6/TFA) 7.4 (s, 1), 2.5 (s, 3) ppm.
Aufarbeitung
- concentrationconcentrated of all volatiles
- customdried in vacuo
Quellen und Nachweise
- ORD-Eintrag
- ord-4b0b88dd956d4bd98fb9abbbfbe86a97
- Quelldatensatz
- uspto-grants-2002_12
- Patentnummer
- US06498185B1
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