Lactone compounds containing an indolizine radical
AssigneeAppleton Papers Inc.
InventorsWilliam J. Becker, Sheldon Farber, Troy E. Hoover
Life of this patent
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Abstract
Chromogenic compounds of normally colorless form are disclosed having the following structural formula: ##STR1## wherein E represents a six-membered aromatic or heterocyclic ring which may have an aromatic condensed ring and both the E ring and the condensed ring may be substituted, A represents an optionally substituted aminophenyl, indolyl, benzoindolyl, julolidinyl or kairolyl radical or the radical represented by B, and B represents a family of indolizine radicals. The compounds of this invention are eligible for use in pressure-sensitive and heat sensitive record materials and manifold marking systems.
Claims83
A compound represented by the formula:
- ##STR20## wherein E is:
- ##STR21## R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are:
- hydrogen, chlorine or dialkylamino;
- A is:
- ##STR22## X is:
- ##STR23## or morpholino;
- R.sub.1 and R.sub.2 are:
- hydrogen, alkyl, phenyl or methyl phenyl;
- R.sub.3 is:
- hydrogen, alkoxy or chlorine;
- B is:
- ##STR24## R.sub.8 is:
- phenyl, phenyl which is substituted by methoxy, phenyl, chloro or dimethylamino, naphthyl, pyridyl or alkyl;
- R.sub.9 is:
- hydrogen, alkyl or phenyl;
- and
- R.sub.10, R.sub.11, R.sub.12 and R.sub.13 are:
- hydrogen or alkyl.
Dependencies are inferred from the claim text.