反应详情

A mixture of 10 mmol of dicyclohexylcarbodiimide and 1.5 ml of toluene is added to a amixture of 10 mmol of p-pentylbenzoic acid, 10 mmol 2,3,4-trifluorophenol (prepared from 1,2,3-trifluorobenzene in accordance with the literature: A. M. Roe et al., Chem. Comm. 1965, 582, by metalation with n-butyllithium at -50° C. analogously to Example 2 and subsequent oxygenation with atmospheric oxygen), 1 mmol of 4-dimethylaminopyridine and 15.0 ml of toluene. After the mixture has been stirred at room temperature for 4 hours, 20 mg of oxalic acid are added and the mixture is stirred for a further 30 minutes. Customary working up gives 2,3,4-trifluorophenyl p-pentylbenzoate.

1. stirringthe mixture is stirred for a further 30 minutes