Hydroxynaphthalenedicarboxylic acid hydrazide dimer and derivatives thereof as well as process for preparing them
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United States of America Patent
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Issued Date -
Oct 19, 2006
app pub date -
Apr 14, 2006
filing date -
Apr 14, 2005
priority date (Note) -
Abandoned
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Abstract
The present invention provides a hydroxynaphthalenedicarboxylic acid hydrazide dimer or a derivative thereof represented by formula (1): wherein X.sub.1 and X.sub.2 are independently selected from the group consisting of carboxyl group, a group represented by formula (2) and a group represented by formula (3): --CO--NH-Z (2) --CO--NHNH.sub.2 (3) Y.sub.1 and Y.sub.2 are independently selected from the group consisting of carboxyl group, carbamoyl group, a group represented by formula (2), a group represented by formula (3) and a group represented by formula (4): --CO--O-A (4) provided that at least one of X.sub.1, X.sub.2, Y.sub.1 and Y.sub.2 is a group represented by formula (3).
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