Twelve N, N-dipropyl-substituted derivatives of trans-2-arylcyclopropylamine have been prepared and assayed for their ability to displace [3H]-8-OH-DPAT from rat brain 5-HT1A receptors. The new derivatives include phenyl (7a), bromo-(7b) and fluorophenyl (7c-e), 2- methoxy-5-fluorophenyl (7h), and 2-hydroxy-5-fluorophenyl (7l) as well as trifluoromethylphenyl (7f) and 2, 3-dichlorophenyl (7g) analogues. In the present series of ...