Preparation of pyridine dyes
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United States of America Patent
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Dec 30, 1997
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N/A
app pub date -
Jul 30, 1996
filing date -
Feb 2, 1994
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Abstract
Methine or azamethine dyes are prepared on the basis of pyridine dyes by condensing an oxime- or formyl-pyridine or its tautomeric form with 5-membered aromatic heterocycles.
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