Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1984-05-01
1986-05-06
Schwartz, Richard A.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
346220, C07D491048
Patent
active
045873437
ABSTRACT:
The invention relates to chromogenic 3,3-bisindolyl-4-azaphthalides of the general formula ##STR1## wherein Y.sub.1 is hydrogen, C.sub.1 -C.sub.12 alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or is C.sub.1 -C.sub.12 acyl, benzyl or benzyl substituted halogen, nitro, lower alkyl or lower alkoxy,
REFERENCES:
patent: 3775424 (1973-11-01), Farber
patent: 3916070 (1975-10-01), Ozutsumi et al.
patent: 4102893 (1978-07-01), Garner et al.
Japanese (Derwent) J49118515.
Bedekovic Davor
Fletcher Ian J.
Ciba-Geigy Corporation
Dentz Bernard I.
Mansfield Kevin T.
McC. Roberts Edward
Schwartz Richard A.
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