A series of 3-(4-piperidinylthio)-1H-indoles was synthesized and evaluated
in mice in the phenylbenzoquinone(PBQ)-induced writhing and hot plate tests
. Most of these compounds are good analgesics with activities comparable to
that of morphine. Among them compound 1i (UP 237-61), which has a strong s
erotonin binding profile, has an interesting antinociceptive activity which
is not reversed by naloxone. (C) 2000 Elsevier Science Ltd. All rights res
erved.