Chemical constitution and anthelmintic activity. III. Preparation of subtituted phenothiazines and some mono and dicyclic analogues

A number of alkoxy- and chlorophenothiazines have been prepared. A simple synthesis of 1,4-thiazane is described, and improved methods of preparation of 1-benzyl- and 1-benzoylpiperazine have been developed and used in the preparation of some monosubstituted piperazines.