Synthesis and antibacterial activity of some novel pyrazolopyridine derivatives
作者:N. Panda、S. Karmakar、A. K. Jena
DOI:10.1007/s10593-011-0699-y
日期:2011.3
Eight pyrazolo[3,4-b]pyridine derivatives have been synthesized by Friedländer condensation of 5-aminopyrazole-4-carbaldehyde with active methylene compounds in basic medium. These compounds have been screened for their antibacterial activity against two Gram-negative and two Gram-positive bacterium. Pyrazolopyridines having the carboxamide group at the 5-position showed moderate to good activity against
通过在碱性介质中5-氨基吡唑-4-甲醛与活性亚甲基化合物的弗里德兰德缩合反应合成了八种吡唑并[3,4- b ]吡啶衍生物。已经筛选了这些化合物对两种革兰氏阴性和两种革兰氏阳性细菌的抗菌活性。在5-位具有羧酰胺基的吡唑并吡啶对铜绿假单胞菌,大肠杆菌,肺炎链球菌和蜡状芽孢杆菌显示中等至良好的活性。
One‐Pot and Convenient Conversion of 5‐Azidopyrazole‐4‐carboxaldehyde to Pyrazolo[3,4‐<i>b</i>]pyridines
作者:Airong Zheng、Wei Zhang、Jinhui Pan
DOI:10.1080/00397910600588868
日期:2006.6.1
Ahluwalia, Vinod K.; Dahiya, Aruna; Carg, Vijay K., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1997, vol. 36, # 1, p. 88 - 90
作者:Ahluwalia, Vinod K.、Dahiya, Aruna、Carg, Vijay K.
DOI:——
日期:——
Chemoselective Synthesis of 5-Alkylamino-1<i>H</i>-pyrazole-4-carbaldehydes by Cesium- and Copper-Mediated Amination
Microwave-assisted synthesis of new 5-alkylamino-pyrazole-4-carbaldehydes was performed efficiently, with yields up to 99 % and short reaction times. Nucleophilic substitution of primary alkylamines with activated 5-chloro-1-(2-pyridyl)pyrazole-4-carbaldehyde was mediated by the “cesium effect”. The amination of deactivated 1-aryl-5-chloropyrazole-4-carbaldehydes was also assisted by the cesium ion