PYRAZOLES .17. SYNTHESIS OF 3(5)-(1'-PYRAZOLYL)PYRAZOLES FROM 1,4-DINITROPYRAZOLE BY CINE SUBSTITUTION-REACTION - STRUCTURE DETERMINATION

The cine substitution of 1, 4-dinitropyrazoles la-b with pyrazoles 2-7 as nucleophiles provides a convenient method of synthesis of 4-nitro-3(5)-(1'-pyrazolyl)pyrazoles 8a-g and 9a-d. Reduction of the 4-nitro group and deamination afford the 3(5)-(l'-pyrazolyl)pyrazoles 12a-b, 12d-e, and 13a-d. Structure assignments are based on and 13C NMR spectra. The 13C spectra of, -dimethylbipyrazoles are reported. Copyright © 1979, American Chemical Society. All rights reserved.