New Derivatives of 1<i>H</i>-imidazo[4,5-<i>b</i>]pyridine-2(3<i>H</i>)- thione. Synthesis of Thiosemicarbazides and Their Cyclic Analogues
作者:Hanna Liszkiewicz
DOI:10.1080/10426500701648077
日期:2008.5.14
A series of 2-(arylthiosemicarbazide)-imidazo[4,5-b]pyridines (6-9) were prepared by reaction of 2-(carbazoylalkylthio)-imidazo[4,5-b]pyridines (4 and 5) with selected arylisothiocyanates. The thiosemicarbazides 6 and 7 were cyclized with 2-bromoacetophenone to give the derivatives of imidazo[4,5-b]pyridine 10 and 11. Compounds (2-11) were characterized by elemental analysis as well as IR and H-s1 NMR spectroscopy.
Sujatha; Jeyanthi; Dayakar G, Indian Journal of Heterocyclic Chemistry, 2010, vol. 20, # 2, p. 177 - 178