反应详情

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.

1. customThe solvent was carefully removed under reduced pressure
2. customthe residue re-evaporated from further DCM
3. additionThe mixture of acid chlorides
4. additionwas then treated with methanol (3 ml)
5. waitkept at room temperature for 2 hours
6. customafter which time the solvent was again carefully removed under reduced pressure
7. additiona mixture of the title product 2-methyl-4,6-bis(trifluoromethyl)benzoyl chloride and methyl 2,4-bis(trifluoromethyl)benzoate
8. customThe mixture was used without further purification