期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
A facile synthesis of 6-amino-2H, 4H-pyrano[2,3-F]pyrazole-5-carbonitriles in deep eutectic solvent 被引量:1
1
作者 Manisha R.Bhosle lalit d.khillare +1 位作者 Sambhaji T.Dhumal Ramrao A.Mane 《Chinese Chemical Letters》 SCIE CAS CSCD 2016年第3期370-374,共5页
A convenient synthesis of 6-amino-2H,4H-pyrano[2,3-F]pyrazole-5-carbonitriles has been accomplished by one pot four-component cyclocondensation of aromatic aldehydes(1a-o) malanonitrile(2), ethyl acetoacetate(3)... A convenient synthesis of 6-amino-2H,4H-pyrano[2,3-F]pyrazole-5-carbonitriles has been accomplished by one pot four-component cyclocondensation of aromatic aldehydes(1a-o) malanonitrile(2), ethyl acetoacetate(3), and hydrazine hydrate(4) in freshly prepared deep eutectic solvent, DES(choline chloride:urea). This protocol has afforded corresponding pyrano[2,3-F]pyrazoles in shorter reaction time with high yields, and it avoids the use of typical toxic catalysts and solvents. 展开更多
关键词 Choline chloride Cyclocondensation DES One pot Urea Pyranopyrazoles
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部