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ChemicalBook CAS DataBase List 5-CHLOROTHIOPHENE-2-CARBONYL CHLORIDE
42518-98-9

5-CHLOROTHIOPHENE-2-CARBONYL CHLORIDE synthesis

8synthesis methods
24065-33-6 Synthesis
5-Chlorothiophene-2-carboxylic acid

24065-33-6
755 suppliers
$6.00/5g

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Yield:42518-98-9 100%

Reaction Conditions:

with thionyl chloride;N,N-dimethyl-formamide in dichloromethane for 16 h;Heating / reflux;

Steps:

12.b (b)
32.0 g (0.20 mmol) 5-chloro-thiophene-2-carboxylic acid are 150 ml dichloromethane refluxed for 16 h with stirring with 100 ml of thionyl chloride and 250 μl DMF. The reaction mixture is evaporated down i. vac., the residue in each case is mixed 5 times with toluene and twice with dichloromethane and evaporated down completely. The residue is further reacted directly without any further purification.Yield: quant.C5H2Cl2OS (181.04)

References:

Dahmann, Georg;Gerlach, Kai;Pfau, Roland;Priepke, Henning;Wienen, Wolfgang;Schuler-Metz, Annette;Nar, Herbert US2008/51578, 2008, A1 Location in patent:Page/Page column 39

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