Butaperazine (Repoise, Tyrylen) is a typical antipsychotic of the phenothiazine class.

2-Butyrylphenothiazine [25244-91-1] (1) is the requisite starting material for carrying out the procedure.

It is prepared in a manner that is synonymous with the method used in the propiomazine and propiopromazine already discussed.

Sodamide is used to extract the 10-H thereby facilitating the nucleophilic substitution reaction.

This drug article relating to the nervous system is a stub.