| abstract |
Substituted pyrido [1,2-a] pyrazine of formula (1) as well as its precursors are ligands for dopamine receptor subtypes and serotonin (5HT) in the body, and thus the compounds are useful for the treatment of diseases of the dopamine and serotonin systems. useful.n n n n n n n n n n Wherein Ar and Ar 1 are various carbocyclic and heterocyclic aromatic rings, A is O, S, SO, SO 2 , CHOH, C═O or — (CR 3 R 4 ), n is from 0 to 2 |