Abstract
In this study N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide was used as a reagent for the three-component one-pot synthesis of some novel 9-aryl-9H-2,4,5,7-tetramethyl-diuracilopyrans, which has not been published before, as well as 9-aryl-3,4,6,7-tetrahydro-2H-pyran-1,8(5H,9H)-diones in excellent yields. This is obtained from the condensation of aromatic and heterocyclic aldehydes and N,N-dimethylbarbituric acid or cyclohexane-1,3-diones in ethanol at room temperature.
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