Iodine is found to be a highly efficient catalyst for the three-component coupling (3CC) of aldehydes, β-naphthol, and 1,3-dimethylbarbituric acid undersolvent-freeconditions to afford the corresponding 8,10-dimethyl-12-aryl-12H-naphtho[1′,2′5,6]pyrano[2,3-d]pyrimidine-9,11-diones in good yields with high selectivity. The use of readily available iodine makes this method very simple, convenient,
发现碘是无溶剂条件下醛,β-萘酚和1,3-二甲基巴比妥酸的三组分偶联(3CC)的高效催化剂,可提供相应的8,10-二甲基-12-芳基-12 H-萘并[1',2'5,6]吡喃并[2,3 - d ]嘧啶-9,11-二酮的收率高,选择性高。使用现成的碘使这种方法非常简单,方便且具有成本效益。