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Syntheses and photophysical properties of some 5(2)‐aryl‐2(5)‐(4‐pyridyl)oxazoles and related oxadiazoles and furans
Author(s) -
Herbert Hall J.,
Chien Joseph Yuming,
Kauffman Joel M.,
Litak Peter T.,
Adams Jeffrey K.,
Henry Ronald A.,
Hollins Richard A.
Publication year - 1992
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.5570290534
Subject(s) - chemistry , oxazole , aryl , molar absorptivity , absorption (acoustics) , furan , base (topology) , fluorescence , photochemistry , combinatorial chemistry , organic chemistry , optics , alkyl , mathematical analysis , physics , mathematics
A number of 5‐aryl‐2‐(4‐pyridyl)oxazoles, a 2‐aryl‐5‐(4‐pyridyl)oxazole, the related oxadiazole and furan, several 2‐(4‐pyridyl)cycloalkano[ d ]oxazoles, and many of their quaternary salts were prepared. No single standard synthesis was effective for preparation of more than a few of the 25 free bases described; methods often unique to a base were employed. Minor variations in structure sometimes produced large differences in absorption and emission wavelengths, as well as in the magnitude of the extinction coefficient. The salts are of interest as laser dyes, scintillation fluors, biological stains, and shifters for luminescent solar concentrators.