A synthesis of oxopyrrolidino[2]azepinones annelated to a thiophene ring 3a,b,c is described starting from succinimide and halogenomethylthiophenes 6a,b,c. Stereoselective reduction, Schmidt reaction and the Beckmann rearrangement of the oximes of the ketones 3a,b,c are studied.
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Mamouni et al. (1996) studied this question.
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