Three new diisothiocyanato-functionalized 2,2′-bipyridines
have been synthesized in four consecutive steps. Starting from 4-amino-2-chloro-
and 2-amino-6-bromopyridine, respectively, we first prepared the
corresponding diamino-2,2′-bipyridines via homo- or Negishi
cross-coupling reactions which were subsequently reacted with thiophosgene.
bipyridine - isothiocyanates - amines - thiophosgene - cross-coupling reactions