An Efficient and Green Synthesis of 6-Amino-3-phenyl-4-aryl-1,4-dihydropyrano [2,3-<i>c</i>]pyrazole-5-carbonitrile Derivatives under Ultrasound Irradiation in Aqueous Medium
作者:Yi Zou、Yu Hu、Hai Liu、Da-Qing Shi
DOI:10.1002/jhet.1627
日期:2013.8
A facile and eco‐friendly approach for the synthesis of 6‐amino‐3‐phenyl‐4‐aryl‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile derivatives via four‐component reaction of hydrazine, ethyl 3‐oxo‐3‐phenylpropanoate, aldehydes, and malononitrile is described. The reaction is performed in water, without using any catalyst, and under ultrasound irradiation. The developed sonochemical‐assisted multi‐component
通过肼,乙基四组分反应合成6-氨基-3-苯基-4-苯基-4-芳基-1,4-二氢吡喃[2,3 - c ]吡唑-5-腈的简便而环保的方法描述了3-氧代-3-苯基丙酸酯,醛和丙二腈。该反应在水中,不使用任何催化剂,并在超声辐射下进行。与常规方法相比,已开发的声化学辅助多组分反应提供了改进和加速的转化。