Water-insoluble azolystyryl optical brighteners
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United States of America Patent
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Apr 9, 1985
Grant Date -
N/A
app pub date -
Jan 14, 1983
filing date -
Jan 30, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to compounds of the formula ##STR1## or isomeric mixtures thereof, wherein A represents a quasiaromatic heterocyclic radical, B represents a radical of the formulae ##STR2## n represents 0, 1, 2 or 3, preferably 0-2, R.sub.1 represents hydrogen, CN, R or acyl, R.sub.2 represents hydrogen, halogen, --OR, --NHR, --N(R').sub.2 or NHCOR, R' represents alkyl and R represents R', alkenyl, aralkyl, cycloakyl or aryl. They are valuable optical brighteners and/or laser dyes and some of them are intermediate products for preparing these end products.
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