Diazotype materials with 2-hydroxy-naphthalene having sulfonamide substituent as coupler
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United States of America Patent
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Jan 8, 1985
Issued Date -
N/A
app pub date -
Sep 15, 1983
filing date -
Jan 29, 1979
priority date (Note) -
Expired
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Abstract
This invention relates to a derivative of 2-hydroxy-naphthalene of the general formula ##STR1## wherein A is ##STR2## and X is --OH or ##STR3## and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are identical or different and are hydrogen, cycloalkyl having up to eight carbon atoms, which is optionally substituted by lower alkyl groups, aralkyl having up to 10 carbon atoms or aryl which is substituted by lower alkyl, lower alkoxy, halogenalkyl or alkyl-substituted amino groups or by halogen, or R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4 in each case are, conjointly with the nitrogen atom to which they are attached, identical or different heterocyclic groups which are optionally substituted by lower alkyl.
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