4-Pyrrolidinylpyridine is an organic compound with the formula (CH<sub>2</sub>)<sub>4</sub>NC<sub>5</sub>H<sub>4</sub>N. The molecule consists of a pyrrodinyl group ((CH<sub>2</sub>)<sub>4</sub>N-) attached via N to the 4-position of pyridine. It is a white solid. The compound has attracted interest because it (pK<sub>a</sub> = 9.58) is more basic than dimethylaminopyridine (pK<sub>a</sub> = 9.41). It is a popular base catalyst.