Hydroquinones

Details Hydroquinones Hydroquinones

1982-06-18

1984-11-20

Raymond, Richard L.

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

Organic compounds

Carboxylic acid esters

544 87, 544173, 546189, 546226, 548524, 548571, 549414, 549415, 549420, 549426, 549427, 549473, 549475, 549480, 549493, 549501, 562478, 564153, 564155, 564170, C07C 6976

Patent

active

044840004

ABSTRACT:
New hydroquinones having the formula: ##STR1## wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2; R is a residue of formula: ##STR2## wherein Q is selected from the residues --COZR.sub.4 wherein Z is 0 or NR.sub.5, --OX wherein X is R.sub.5 or --COR.sub.7, --NR.sub.8 R.sub.9, --PO(OR.sub.10)[O].sub.x R.sub.11 wherein x is 0 or 1, --SO.sub.2 R.sub.12 or --CN, and salts thereof with organic or inorganic acid bases.
The groups, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, k and n are defined hereafter.
These compounds are used as stabilizers in photographic materials.

REFERENCES:
patent: 3957836 (1976-05-01), Morimoto et al.
patent: 4139545 (1979-02-01), Morimoto et al.
patent: 4271083 (1981-06-01), Morimoto et al.

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