Efficient synthesis of Some Novel Symmetrical and Unsymmetrical Pyridine bis-1,2,4-triazoles and bis-1,3,4-thiadiazoles
作者:Naser Foroughifar、Akbar Mobinikhaledi、Abdolhossein Rafiee
DOI:10.3184/174751914x13896291543361
日期:2014.2
series of novel bis-1,2,4-triazoles and bis-1,3,4-thiadiazoles bearing pyridine rings was synthesised, by multistep reaction sequences, in good to high yields. Reaction of pyridine-2,5-bis- and pyridine-2,6-bis-carbohydrazides with alkyl- or aryl-isothiocyanates gave the corresponding bis(thiosemicarbazide) derivatives, which could be cyclised under strongly basic conditions to give novel pyridine bis(1
通过多步反应顺序合成了一系列新型双-1,2,4-三唑和双-1,3,4-噻二唑类吡啶环,产率高。吡啶-2,5-双-和吡啶-2,6-双-碳酰肼与烷基-或芳基-异硫氰酸酯反应得到相应的双(氨基硫脲)衍生物,可以在强碱性条件下环化得到新型吡啶双( 1,2,4-三唑-3-硫醇)。然而,在强酸性条件下获得了相应的双(2-氨基-1,3,4-噻二唑)。报道了新化合物的合成路线和光谱表征。