2(Indol-3'-oyl) 3,4,5,6-tetrahalo benzoic acid anhydrides

Details 2(Indol-3'-oyl) 3,4,5,6-tetrahalo benzoic acid anhydrides 2(Indol-3'-oyl) 3,4,5,6-tetrahalo benzoic acid anhydrides

1979-05-10

1981-07-07

Rizzo, Nicholas S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032614R, 252275, C07D20918

Patent

active

042774004

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.

REFERENCES:
patent: 3540911 (1970-11-01), Lin
patent: 3829322 (1974-08-01), Ozutsumi et al.

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