Heterocyclic substituted fluorans

Details Heterocyclic substituted fluorans Heterocyclic substituted fluorans

1975-09-30

1977-02-08

Gotts, Lewis

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032634, 2603265CA, 26032685, 260335, 2602475H, 2602477T, 26029356, 2602472A, 260295T, 260296T, 260297T, C07D27100

Patent

active

040071952

ABSTRACT:
Heterocyclic substituted fluoran compounds of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently of the other, represent hydrogen, alkyl with 1 to 4 carbon atoms, nitro or halogen or

REFERENCES:
patent: 3929831 (1975-12-01), Garner et al.

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