Benzoxazolinone derivatives have been found to exhibit various pharmacological properties and 6‐acyl‐2(3 H )‐benzoxazolones are considered as key starting materials for the preparation of these compounds. Reported here are the optimal conditions for a regioselective acylation at the 6‐position of the benzoxazolinone ring. A general method leading to the expected products in excellent yields consists in using a mixture of aluminum chloride‐dimethylformamide as catalyst and acid anhydrides or chlorides as acylating agents.
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Aichaoui et al. (1992) studied this question.
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