Abstract The transfer hydrogenation reaction of [1, 2, 3] triazolo [1, 5-a] pyridines with Pd/C/Zn or Pd (OH) 2/C/Zn in water, ethanol or water/ethanol mixture has been explored. 4, 5, 6, 7-Tetrahydrotriazolopyridines were obtained in good to medium yields. In addition, under the same conditions 2-substituted pyridines were also formed as a result of intermediate pyridylcarbene formation, by triazole ring opening and loss of nitrogen. ...
![3-pyridin-2-yltriazolo[1,5-a]pyridine Structure](https://image.chemsrc.com/caspic/254/947-88-6.png)
![[1,2,3]Triazolo[1,5-a]pyridine Structure](https://image.chemsrc.com/caspic/182/274-59-9.png)
![3-Methyl[1,2,3]triazolo[1,5-a]pyridine Structure](https://image.chemsrc.com/caspic/445/54856-82-5.png)
![[1,2,3]Triazolo[1,5-a]pyridine,3-phenyl- Structure](https://image.chemsrc.com/caspic/255/832-81-5.png)
