反应详情

A mixture of 0.11 mol of dicyclohexylcarbodiimide and 20 ml of toluene is added to a mixture of 0.1 mol of p-pentylbenzoic acid, 0.1 mol of 2,3-difluoro-4-cyanophenol (prepared according to Example 4), 1.5 g of 4-N,N-dimethylaminopyridine and 200 ml of toluene. After the mixture has been stirred at room temperature for 4 hours, 0.4 g of oxalic acid is added and stirring is continued for a further 30 minutes. Customary working up gives 4-(4-pentylbenzoyloxy)-2,3-difluorobenzonitrile, mp. 33° C.

1. stirringstirring
2. waitis continued for a further 30 minutes