Diheterocyclic compounds from dithiocarbamates and derivatives thereof. II. 2,2′-Diamino-6,6′-bibenzoazoles

The readily available dithiocarbamates and dithiocarbonimidates 4, 8, 14 and 15 afford in one step the title compounds in medium to very good yields. In each case, the choice of reagent depends on the nature of the group to be introduced. Their usefulness as synthetic equivalents of weakly reactive or unavailable isothiocyanates is also discussed.