2, 6-Bis-hydrazinopyridine has been prepared and characterized for the first time. This material is useful for the preparation of a wide variety of 2, 6-bis-pyrazolylpyridines. This approach represents the most efficient preparation to date of sterically crowded 2, 6-bis- pyrazolylpyridines, and the only method for the preparation of pyrazolylpyridines containing unsymmetrically 3′, 5′-disubstituted pyrazoles with the larger groups in the 5′ ...
