A series of heterocyclic 2-(3,5-dimethylphenyl)tryptamine derivatives was p
repared and evaluated on a rat gonadotropin releasing hormone receptor assa
y. The carbon tether length and heterocyclic ring attached to the amino gro
up of 2-(3,5-dimethylphenyl)tryptamine were varied. Several of these deriva
tives were potent GnRH antagonists with the most potent compound having an
IC50 of 16nM. (C) 2001 Elsevier Science Ltd. All rights reserved.