Diastereomeric separation of 1,5-benzodiazepines due to the presence of a chiral centre on the N-5 alkylic chain.

The presence of a chain bearing a stereogenic centre at the N-5 position of 1-(1-adamantylmethyl)-3-arylureido-2,4-dioxo-1,5-benzodiazep ines induces optical resolution. The synthesis of these compounds and their potency as potential CCK-B receptor antagonists is discussed briefly here.