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Abstract
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In this paper, a one-step copper-catalyzed procedure for oxidative coupling of active methylene compounds
including cyclic b-diketones, cyclic b-ketoesters and 5-pyrazolone with benzenethiols is
described. Benzenethiols are in situ generated in the reaction mixture from aryl halides and thiourea as
sulfur transfer reagent. a-Thioaryl compounds are obtained in excellent yields and in short reaction time
via the process which is free from the foul smell of thiols.
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