Novel, Achiral 1,3,4-Benzotriazepine Analogues of 1,4-Benzodiazepine-Based CCK₂ Antagonists That Display High Selectivity over CCK₁ Receptors

A series of 1,3,4-benzotriazepine-based CCK(2) antagonists have been devised by consideration of the structural features that govern CCK receptor affinity and the receptor subtype selectivity of 1,4-benzodiazepine-based CCK(2) antagonists. In contrast to the latter compounds, these novel 1,3,4-benzotriazepines are achiral, yet they display similar affinity for CCK(2) receptors to the earlier molecules and are highly selective over CCK(1) receptors.