Green synthesis of polyhydroquinolines catalyzed by silica‐supported ionic liquid Si–[SbSipim][PF6]

Silica‐supported ionic liquid Si–SbSipim]PF₆] as a catalyst was used first in the synthesis of polyhydroquinolines. The catalyst exhibits high catalytic activity in the reaction, and can be easily recovered and reused without significant loss of its activity for six runs. This green method offers several advantages, including high yield, short reaction time, simple work‐up procedure, ease of separation, and recyclability of the catalyst.