Hydroxyphenamate or oxyfenamate (trade name Listica) is a sedative and anxiolytic drug of the carbamate class which is no longer marketed in the US.
Like other carbamate sedatives, it is chemically related to meprobamate (Miltown).
The dosage for adults is 200 mg 3 to 4 times daily.
The reduction by hydride of the acid to the alcohol gives 2-phenyl-1,2-butanediol (4).
For the final step in the synthesis, treatment with ethyl chloroformate followed by addition of aqueous ammonia gave the carbamate, and hence hydroxyphenamate (5).