Chromogenic dihydrofuropyridinones

Details Chromogenic dihydrofuropyridinones Chromogenic dihydrofuropyridinones

1986-02-04

1987-09-22

Jiles, Henry R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D491048

Patent

active

046956360

ABSTRACT:
Chromogenic azaphthalides of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of each other are hydrogen, C.sub.1 -C.sub.12 alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or are cycloalkyl, benzyl or phenyl, or benzyl or phenyl which are substituted by halogen, nitro, cyano, lower alkyl, lower alkoxy or lower alkoxycarbonyl; or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached are a 5-membered or 6-membered heterocyclic radical and in particular pyrrolidinyl;

REFERENCES:
patent: 4046776 (1977-09-01), Garner et al.
patent: 4564679 (1986-01-01), Fujino et al.

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