A Facile Approach for the Synthesis of Novel 1,2,4-Triazolo[4,3-a]Pyridine Derivatives in Single Step
作者:G. Santhosh Kumar、C. Kurumurthy、P. Sambasiva Rao、B. Veeraswamy、P. Shanthan Rao、B. Narsaiah
DOI:10.1002/jhet.1977
日期:2015.1
A series of novel substituted 4‐trifluoromethyl‐pyridin‐2‐yl hydrazide derivatives 5 and 7‐trifluoromethyl‐1,2,4‐triazolo[4,3‐a]pyridine derivatives 6 were synthesized through a facile method in single step from 2‐hydrazino‐pyridine derivatives 4 and their reaction with aliphatic/aromatic acids in the presence of POCl3 and PCl5. In each reaction, an intermediate 5 and product 6 were formed in definite
通过简便的方法从2到2一步合成了一系列新颖的取代的4-三氟甲基-吡啶-2-基肼衍生物5和7-三氟甲基1,2,4-三唑并[4,3-a]吡啶衍生物6。 -肼基吡啶衍生物4及其在POCl 3和PCl 5存在下与脂族/芳族酸的反应。在每个反应中,除了5a,5d和6e外,中间体5和产物6均以一定比例形成,并且与反应时间和温度无关。