Novel classes of 13- and 14-tertbutyl-ergoline derivatives were prepar
ed, and characterised in vitro for their affinity for adrenergic, dopa
minergic and serotonergic binding sites. This study particularly exami
nes the importance of the presence and the position of the tert-butyl
group in conferring either significant 5-HT1A or 5-HT2 affinity and se
lectivity respectively. (C) 1998 Elsevier Science Ltd. All rights rese
rved.