4-(3-Phenylpropyl)pyridine (CAS# 2057-49-0) is used in preparing various catalytic mediums. It is used in the preparation of a N-heterocyclic carbene ligand for selective C-4 alkylation of pyridine by nickel/Lewis acid catalysts. It is also used in the preparation of (phenylpropyl)pyridine oxide for manganese-salen-catalyzed asymmetric epoxidation of indene. Additionally, it is also used in the regioselective preparation of diaryloxindoles by arylation of isatins with substituted benzenes in superacidic solutions.