A Pd/C/Zn mixture with alcohols has been revealed to be an efficient transfer hydrogenation system to quinolines. Furthermore, the metals mixture is able to activate alcohols as N- alkylating agents in a hydrogen autotransfer process. 1, 2, 3, 4-Tetrahydroquinolines and N- alkylated tetrahydroquinolines from quinolines have been obtained with excellent yields in one step.
![5,6-二氢-4H-吡咯并[3,2,1-ij]喹啉结构式](https://image.chemsrc.com/caspic/077/5840-01-7.png)
