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Phencyclidine (1-(1-phenylcyclohexyl)piperidine, CAS 956-90-1, PCP) has shown analgesic effects. Some of its derivatives have been synthesized and their biological properties were studied. Since a hydroxyl group has been added to the position 2 of the cyclohexane ring of PCP, this compound would be more hydrophilic than PCP. This compound was synthesized using a different and improved method with a higher yield. Its analgesic effect was studied using the tail-flick test on rats and was compared with that of ketamine (CAS 1867-66-9). The results showed that 2-hydroxyphencyclidine can increase tail-flick latencies as compared to the control group and indicate that the maximum analgesic effect of this compound occurs 2-5 min after its injection while the effect of ketamine is observed 10-25 min after injection.
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