In the search for new ligands of the histamine H3 receptor, novel diarylalkyl carbamates (1– 19) were synthesized as derivatives of 3-(1H-imidazol-4-yl) propanol and-ethanol. Carbamates were built up via isocyanates either from corresponding amines by reaction with diphosgene or from related carboxylic acid/diphenylphosphoryl azide and the alcoholic component. Sterically hindered amines were prepared in a two-step reaction sequence ...