ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
α,β-Unsaturated ketones derived from acetylpyridines. IX. Reaction of pyridine analogs of 1,3,5-triphenyl-2-pyrazoline with N-bromosuccinimide
A. Brádlerová, L. Szücs, J. Ďurinda, and J. Heger
Department of Inorganic and Organic Chemistry, Faculty of Pharmacy,
Komenský University, 880 34 Bratislava
Abstract: Pyridine analogs of l1,3,5-triphenyl-2-pyrazoline reacted with N-bromosuccinimide
to give, instead of the expected 1,3,5-trisubstituted pyrazoles,
1-p-bromophenyl-2-pyrazolines. The same products were obtained in an
independent manner from the isomeric azachalcones and p-bromophenylhydrazine.
The identity of the products was proved by means of their oxidation
with lead tetraacetate which afforded 1,3,5-trisubstituted pyrazoles.
The confirmation of the structure of the isolated products was based on the
u.V., i.r., and p.m.r. spectral data.
Full paper in Portable Document Format: 296a795.pdf
Chemical Papers 29 (6) 795–802 (1975)