Na<sub>2</sub>S-promoted reduction of azides in water: synthesis of pyrazolopyridines in one pot and evaluation of antimicrobial activity
作者:Ashok Kale、Nagaraju Medishetti、Sirisha Kanugala、Ganesh Kumar C、Krishnaiah Atmakur
DOI:10.1039/c8ob03171a
日期:——
with various ketones lead to pyrazolo[3,4-b]pyridines in one pot. Thus, a number of new trifluoromethyl-substituted pyrazolo[3,4-b]pyridine compounds have been prepared and screened for antimicrobial activity against different Gram-positive and Gram-negative strains. A good number of compounds, 4a, 4b, 4d, 4f, 4i, 4k, 4l, 4m, 4r and 4s, were found to possess promising activity. Notably, Na2S on hydrolysis
使用Na 2 S还原各种叠氮化物已在水中完成,并且在原位,与各种酮反应生成的胺可在一锅中生成吡唑并[3,4- b ]吡啶。因此,已经制备了许多新的三氟甲基取代的吡唑并[3,4- b ]吡啶化合物,并针对不同的革兰氏阳性和革兰氏阴性菌株筛选了抗菌活性。大量的化合物4a,4b,4d,4f,4i,4k,4l,4m,4r和4s被发现具有广阔的发展前景。值得注意的是,Na 2 S在水中水解时会生成H 2 S和NaOH,这有助于叠氮化物的还原,然后进行分子内环化,生成标题化合物。据我们所知,这是在单锅反应中在水性介质中合成标题化合物的第一份报告。