Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1982-06-16
1986-01-14
Jiles, Henry R.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C07D47102
Patent
active
045646791
ABSTRACT:
The chromogenic azaphthalide compounds of the invention are of the formula: ##STR1## wherein A is a pyridine ring; R.sub.1 is hydrogen atom or alkyl radicals of from one to 4 carbon atoms; X is hydrogen atom, alkyl radicals of from one to 2 carbon atoms or alkoxy radicals of from one to 2 carbon atoms; R.sub.2 is alkyl radicals of from one to 2 carbon atoms or phenyl radical; R.sub.3 is hydrogen atom or alkyl radicals of from one to 8 carbon atoms.
These compounds are particularly suitable for use in providing high quality pressure- or heat-sensitive copying sheets.
REFERENCES:
patent: 3775424 (1973-11-01), Farber
patent: 3853869 (1974-12-01), Farber
patent: 4191827 (1980-03-01), Nadelson
patent: 4275905 (1981-06-01), Miller
patent: 4299411 (1981-11-01), Brockett
Fieser & Fieser, Organic Chemistry, D. C. Heath & Co., Boston, 3rd Edition, p. 46.
Fujino Yoshiharu
Kawai Hajime
Nakai Yasushi
Tsunemitsu Katsuhiko
Jiles Henry R.
Whittenbaugh Robert C.
Yamada Chemical Co., Ltd.
LandOfFree
Chromogenic compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chromogenic compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromogenic compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-431410