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Cinnoline chemistry. XI. The ultraviolet spectra of halogen substituted 4‐hydroxy‐ and 4‐mercaptocinnolines
Author(s) -
Shoup Regitze R.,
Castle Raymond N.
Publication year - 1965
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570020111
Subject(s) - chemistry , halogen , bromine , chlorine , cinnoline , ultraviolet , fluorine , methanol , spectral line , chloride , medicinal chemistry , organic chemistry , alkyl , physics , quantum mechanics , astronomy
The ultraviolet spectra of a series of 4‐hydroxy‐ and 4‐mercaptocinnolines substituted with fluorine, chlorine or bromine in the 5‐, 6‐, 7‐ and 8‐position have been obtained in absolute methanol solution between 200 and 500 mμ. The spectra were used, to make structural assignments for the products of cyclization from mesoxalyl chloride, m ‐fluoro‐and m ‐bromophenylhydrazones.