Jl. Peglion et al., TETRACYCLIC ANALOGS OF [-S14297 - SYNTHESIS AND DETERMINATION OF AFFINITY AND SELECTIVITY AT CLONED HUMAN DOPAMINE D-3 VS D-2 RECEPTORS(]), Bioorganic & medicinal chemistry letters, 7(7), 1997, pp. 881-886
Starting from the structure of the preferential D-3 antagonist S 14297
(1), we have prepared a series of cis and trans tetracyclic derivativ
es of general formula I in order to improve potency and selectivity fo
r D-3 receptors. The trans oxazino derivative 2c, showed slightly incr
eased affinity at D-3 receptors and double the selectivity for D-3 ove
r D-2 receptors, in comparison to S 14297. Cis derivatives and compoun
ds where R-1 is aralkyl were totally devoid of activity. (C) 1997 Else
vier Science Ltd.