Oxalyl chloride → HCID 59347787, Verbindung

Reaktionsgleichung

[CH3:1][C:2]1[CH:10]=[C:9]([C:11]([F:14])([F:13])[F:12])[CH:8]=[C:7]([C:15]([F:18])([F:17])[F:16])[C:3]=1[C:4](O)=[O:5].C(Cl)(=O)C([Cl:22])=O>C(Cl)Cl.CN(C=O)C>[CH3:1][C:2]1[CH:10]=[C:9]([C:11]([F:14])([F:13])[F:12])[CH:8]=[C:7]([C:15]([F:18])([F:17])[F:16])[C:3]=1[C:4]([Cl:22])=[O:5]

Komponenten

Versuchsvorschrift

A solution of 2-methyl-4,6-bis(trifluoromethyl)benzoic acid D52 alternative method (400 mg, approximately 1.47 mmol) in DCM (5 ml), containing DMF (1 drop), was treated with oxalyl chloride (166 ul, 1.91 mmol) and stirred under argon for 1 hour. The solvent was carefully removed under reduced pressure and the residue re-evaporated from further DCM. The mixture of acid chlorides was then treated with methanol (3 ml) and kept at room temperature for 2 hours after which time the solvent was again carefully removed under reduced pressure. NMR data indicated this to be a mixture of the title product 2-methyl-4,6-bis(trifluoromethyl)benzoyl chloride and methyl 2,4-bis(trifluoromethyl)benzoate. The mixture was used without further purification.