Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The synthesis of some 5-, 6-, and 7-halogenotriazolopyridines is described, and their reactions with nucleophiles. The formation of 7,7′-bitriazolopyridines provides a new synthesis of 2,2′-bipyridines. ... 5- and 7-halogenotriazolopyridines react with nucleophiles. ...