以金属硫酸氢盐M(HSO4)n(Ca(HSO4)2, Zn(HSO4)2和过硫酸氢钾制剂oxone(R))为催化剂催化醛、1,3-二羰基化合物和尿素进行缩合反应,在90 ℃及无溶剂的条件下高收率、一锅法合成了 3,4-二氢嘧啶-2(1H)-酮.
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