Proof of Concept Study for Designed Multiple Ligands Targeting the Dopamine D2, Serotonin 5-HT2A, and Muscarinic M1 Acetylcholine Receptors

Herein we describe the hybridization of a benzoxazinone M-1 scaffold with D-2 privileged structures derived from putative and clinically relevant antipsychotics to develop designed multiple ligands. The M-1 mAChR is an attractive target for the cognitive deficits in key CNS disorders. Moreover, activity at D-2 and 5-HT2A receptors has proven useful for antipsychotic efficacy. We identified 9 which retained functional activity at the target M-1 mAChR and D2R and demonstrated high affinity for the 5-HT2AR.