A concise synthesis of 6-amino-4-aryl-3-(trifluoromethyl)-1,4-dihydro-1-phenylpyrano[2,3-c]pyrazole-5-carbonitriles was performed effectively in aqueous media without catalyst by the reaction of aryl aldehydes, malononitrile, and 1-phenyl-3-(trifluoromethyl)-1H-pyrazol-5(4H)-one. This method has the advantages of mild condition, avoidance of the use of catalysts, high yields, and environmentally benign procedure.
通过芳基醛、
丙二腈和 1-苯基-3-(三
氟甲基)-1H-
吡唑-5(4H)-酮的反应,在
水介质中无催化剂有效合成了 6-
氨基-4-芳基-3-(三
氟甲基)-1,4-二氢-1-苯基
吡喃并[2,3-c]
吡唑-5-甲腈。这种方法具有条件温和、无需使用催化剂、产率高和对环境无害等优点。