(N-Substituted benzoyl)halobenzoic acid anhydrides
AssigneeCiba-Geigy Corporation
InventorsRobert Garner, Michael J. Whitehead
Life of this patent
Estimating the term…
Abstract
Anhydride compounds of the formula ##STR1## wherein A is an optionally substituted amino-phenyl or optionally substituted 3-indolyl radical, Hal represents halogen, Z represents hydrogen, alkyl of 1 to 4 carbon atoms or an optionally substituted phenyl radical and n is 1 to 4; these anhydrides are particularly useful as starting materials for the manufacture of halogenated 3-aryl-3-indolyl-phthalides or fluoran derivatives.
Claims6
A compound of the formula ##STR23## wherein R.sub.1 and R.sub.2 are each independently hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl, cyclopentyl, cyclohexyl, phenyl, benzyl, halophenyl, halobenzyl, nitrophenyl, nitrobenzyl, lower alkylphenyl, lower alkylbenzyl, lower alkoxybenzyl or lower alkoxybenzyl, or R.sub.1 and R.sub.2, together with the nitrogen atom to which they are attached are pyrrolidino, piperidino, pipecolino, morpholino, thiomorpholino or piperazino;
- X is one or more of halo, nitro, --NR.sub.1 (R.sub.2), hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl, cyclopentyl, cyclohexyl, phenyl, benzyl, halophenyl, halobenzyl, nitrophenyl, nitrobenzyl, lower alkylphenyl, lower alkylbenzyl, lower alkoxyphenyl or lower alkoxybenzyl;
- Hal is halo;
- Z is hydrogen, C.sub.1 -C.sub.4 -alkyl, phenyl, halophenyl, methylphenyl, methoxyphenyl, ethoxyphenyl, lower alkylamino or di-lower alkylamino;
- and
- n is 1 to 4.
2-(4'-diethylamino-2'-ethoxy-benzoyl)-3,4,5,6-tetrachloro-benzoic acetic anhydride.
Dependencies are inferred from the claim text.