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.
本研究以N,N,N',N'-四
溴苯-1,3-二磺酰胺为试剂,三组分一锅法合成了一些新型9-芳基-9H-2,4,5,7 -四甲基-二尿
嘧啶,以前从未发表过,以及 9-芳基-3,4,6,7-四氢-
2H-吡喃-1,8(5H,9H)-二酮,收率极佳。它是由芳香醛和杂环醛与 N,N-二甲基
巴比妥酸或
环己烷-1,3-二酮在
乙醇中在室温下缩合而得。