An amine catalyst is a type of catalyst that contains an amine functional group, which can accelerate a chemical reaction by facilitating the formation of a transition state. Amines can serve as nucleophiles, Lewis bases, or proton acceptors, and are commonly used in organic synthesis to promote reactions such as acylation, alkylation, and condensation. Some examples of amine catalysts include triethylamine, pyridine, and quinuclidine.