Microwave-assisted synthesis of pyrano[2,3-c]-pyrazole derivatives and their anti-microbial, anti-malarial, anti-tubercular, and anti-cancer activities
作者:Paranjay H. Parikh、Jignesh B. Timaniya、Mrugesh J. Patel、Kaushal P. Patel
DOI:10.1016/j.molstruc.2021.131605
日期:2022.2
We have described solvent-free preparation of new pyrano[2,3-c]-pyrazole-5-carbonitriles (1-10) from the reaction of 1,3-diketo ester, aryl hydrazine, aromatic aldehyde, and malononitrile catalyzed by Zinc triflate (which was recycled and reused up to five times) undermicrowave irradiation (MWI) at 80–120 °C. An augmented yield with shorter reaction times is the added advantage of the present work
我们已经描述了通过锌催化的 1,3-二酮酯、芳基肼、芳香醛和丙二腈的反应无溶剂制备新型吡喃并[2,3-c]-吡唑-5-腈 (1-10)在 80–120 °C 的微波辐射 (MWI) 下,三氟甲磺酸盐(可回收并重复使用最多五次)。以更短的反应时间提高产率是目前工作的额外优势。筛选所有合成分子的抗疟疾、抗微生物、抗结核和抗癌活性。大多数测试化合物表现出显着的抗菌和抗疟疾活性,一些类似物显示出抗癌活性。
An aqueous, catalyst-free and three-component synthesis of 6-amino-3-(trifluoromethyl)-1,4-dihydro-1-phenyl-4-arylpyrano[2,3-c]pyrazole-5-carbonitriles
作者:Chenxia Yu、Changsheng Yao、Tuanjie Li、Xiangshan Wang
DOI:10.1007/s11164-013-1058-7
日期:2014.4
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.