enantiomerically pure 4-chloro(amino)pyridine derivatives has been synthesised through a chemoenzymatic approach, Candida antarctica lipase B (CAL-B) and Pseudomonascepacialipase (PSL) being found to be excellent biocatalysts for the preparation of new and interesting amines and amides in enantiomerically pure form through enzymatic aminolysis reactions. A study of the enzymatic reactivity of CAL-B and PSL