Synthesis and anticonvulsant activity of 1-phenylcyclohexylamine analogues.
Thirty-eight analogues of 1-phenylcyclohexylamine (PCA), a phencyclidine (PCP) derivative, were examined for their activities in the mouse maximal electroshock (MES) seizure test and in a motor-toxicity assay. In addition, we determined the binding affinities of the compounds for PCP acceptor sites in rat brain membranes labeled with [3H]-1-[1-(2-thienyl)cyclohexyl]piperidine. Many of the analogues were protective against MES seizures (ED50s of 5-41 mg/kg, ip) and all of these compounds caused motor toxicity. The potencies in the motor toxicity and MES seizure tests showed a moderate correlation with the affinities for PCP sites. Several analogues exhibited a greater separation of potencies in the motor toxicity and MES seizure tests than did the parent compound PCA. These were obtained by (i) 3-methylation of the cyclohexyl ring trans to the phenyl ring, (ii) methoxylation at the ortho position on the phenyl ring, and (iii) contraction of the cyclohexane ring to form the corresponding cyclopentane.
Thurkauf
A
A
Laboratory of Medicinal Chemistry, National Institute of Diabetes, Digestive and Kidney Diseases, and Medical Neurology Branch, National Institutes of Health, Bethesda, Maryland 20892.
de Costa
B
B
Yamaguchi
S
S
Mattson
M V
MV
Jacobson
A E
AE
Rice
K C
KC
Rogawski
M A
MA
D000818:Animals; D000927:Anticonvulsants / Q000138:chemical synthesis*; D001665:Binding Sites; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D055598:Chemical Phenomena; D002621:Chemistry; D003514:Cyclohexylamines / Q000138:chemical synthesis* / Q000494:pharmacology; D004558:Electric Stimulation; D008297:Male; D051379:Mice; D009043:Motor Activity / Q000187:drug effects; D010622:Phencyclidine / Q000031:analogs & derivatives* / Q000494:pharmacology; D012640:Seizures / Q000517:prevention & control; D013329:Structure-Activity Relationship
D000927:Anticonvulsants; D003514:Cyclohexylamines; D010622:Phencyclidine