Heterocyclic pigments and dyes

Details Heterocyclic pigments and dyes Heterocyclic pigments and dyes

1989-04-19

1991-06-04

Shen, Cecilia

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

548156, 548159, 548181, 548327, 548328, 548336, 548374, 548433, C07D40314, C07D48702, C07D41700, C07D23504

Patent

active

050215736

ABSTRACT:
A compound of formula I ##STR1## in which each R.sub.1 independently is selected from oxygen, .dbd.NH or .dbd.N--R.sub.2 where R.sub.2 is an aromatic or heteroaromatic group, provided not more than two groups R.sub.1 are selected from oxygen and .dbd.NH.

REFERENCES:
patent: 4255313 (1981-03-01), Antonoplos et al.
patent: 4289784 (1981-09-01), Bochis et al.
patent: 4320129 (1982-03-01), Fisher et al.
Hodd, Chem. Abst., 78-137959z, (1973).
Diebig et al., Chem. Abst., 80-3827n, (1974).
Hodd et al., Chem. Abst., 87-6400y, (1977).
Chem. Abs., 100:192426w, (1984).
Chem. Abs., 88:145368c.
Chem. Abs., 73:131375f, (1970).

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