1, 5-Pyrindine has been synthesized by treatment of 7-hydroxy-6, 7-dihydro-1, 5-pyrindine or its acetate ester with hot, concentrated sulfuric acid. The ester was prepared by treatment of 6, 7-dihydro-1, 5-pyrindine-N-oxide with acetic anhydride. Sodium bisulfite may be added to the rather unstable pyrindine in a manner apparently analogous to its addition to 2- vinylpyridine. Other chemical and physical properties of the unsaturated compound are ...
![1,5,6,7-四氢-4-羟基-2H-环戊并[b]吡啶-2-酮结构式](https://image.chemsrc.com/caspic/016/55618-81-0.png)
![2,4-二氯-6,7-二氢-5H-环戊二烯并[b]吡啶结构式](https://image.chemsrc.com/caspic/272/56946-65-7.png)
