An environmentally friendly synthesis of 1,4-dihydropyrano[2,3-c]pyrazole derivatives catalyzed by tungstate sulfuric acid
2014
6-amino-4-aryl-5-cyano-3-methyl-1-phenyl-1,4-dihydropyrano 的有效三部件的合成[2,3-c ] 经由在用钨酸盐的 3-methyl-1-phenyl-2-pyrazolin-5-one,芳香的醛和 malononitrile 之间的反应的 pyrazoles 催化剂被描述的硫磺的酸。温和条件,对优秀收益,容易可得到的催化剂和容易的病情的检查好是这个方法的特色。
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