Thirty‐six new N,N'‐disubstituted thioureas have been synthesized by the reaction of phenyl‐, p‐fluorophenyl‐ and benzoylisothiocyanates with various substituted anilines, aminopyridines and 4‐aminoquinolines. The uv, ir and nmr spectral data are presented and discussed.

A series of N‐substituted 2‐aminobenzothiazoles, 2‐aminothiazolopyridines, and 2‐aminothiazoloquinolines were prepared by the cyclization of N,N'‐disubstituted thiourea derivatives by bromine in acetic acid. The uv, ir and nmr data for these compounds are presented and discussed.

Aus den N‐Aryl‐N′‐benzoyl‐thioharnstoffen (I) erhält man bei der Oxidation mit Brom die kondensierten Benzothiazole (II), analog entstehen die kondensierten Thiazole (III) und (IV).

Für breit angelegte biologische Untersuchungen werden zahlreiche Thioharnstoffe (III) bzw. (IV) hergestellt.