Preparation of rhodanine derivatives as possible anthelmintics

Rhodanine derivatives, including metallic derivatives of rhodanine, benzylidenerhodanines, compounds containing phenothiazine residues, and phenylimino-compounds have been prepared as possible anthelmintics. A mechanism for the formation of the phenylimino-compounds is suggested. Some of the benzylidene derivatives are very active towards liver fluke (Fasciola hepatica).