| http://www.w3.org/ns/prov#value | - ared by the process outlined in Scheme 42. 4-Cyano-4-phenylpiperidine hydrochloride 138 is treated with base, such as KOH, at a temperature above RT, preferably at a temperature above about 100??? C., and more preferably at a temperature at about 160??? C., to provide the phenyl piperidine 139.
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