Sulphonated coumarin derivatives

Details Sulphonated coumarin derivatives Sulphonated coumarin derivatives

1974-10-15

1976-09-07

Schenkman, Leonard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D23972

Patent

active

039793893

ABSTRACT:
The present invention provides compounds of formula I, ##SPC1##
in which,
Either R.sub.1 signifies an unsubstituted or substituted (C.sub.1.sub.-4) alkyl radical,
R.sub.2 signifies a hydrogen atom or an unsubstituted or substituted (C.sub.1.sub.-4) alkyl radical,
Or, R.sub.1 and R.sub.2, together with the nitrogen atom to which they are attached, form a pyrrolidine, piperidine or morpholine ring,
R signifies a group of formula (a) or (b), ##SPC2##
In which
R.sub.3 signifies a condensed further unsubstituted or substituted pyrimidine, pyridine or benzene ring or a condensed further unsubstituted naphthalene ring, and
M signifies a hydrogen ion or a cation equivalent, which compounds are useful as anionic dyes.

REFERENCES:
patent: 3763178 (1973-10-01), Sulkowski
Nocler, Chemistry of Organic Compounds (Textbook), Pub., W. B. Saunders Co., 3rd Ed., 1965, p. 471.
Chemical Abstracts, 80:49259g & 49260a (1974).

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