Synthesis of the Novel 4,4- and 6,6- Dihydroxamic - 2,2-Bipyridines and Improved Routes to 4,4- and 6,6- Substituted 2,2-Bipyridines and Mono-N-Oxide-2,2-Bipyridine
1998
The preparation of key precursors for many 2,2-bipyridine derivatives such as 4,4-dicarboxy- 2,2-bipyridine (I), 6,6-dicarboxy-2,2-bipyridine- acid (II), 4,4-dinitro-2,2-bipyridine-N,N-dioxide (III), 6,6-dicarbothioamide-2,2-bipyridine (IV) and mono-N-oxide-2,2-bipyridine (VII) through more efficient methods is described. The syntheses of the novel ligands 4,4-dihydroxamic-2,2-bipyridine (V) and 6,6-dihydroxamic-2,2-bipyridine (VI) are also reported.
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