Back to results
US 6,476,202 B1Granted
5-acylamino-2-arylazo, nitro, or nitroso-4-substituted-phenol compounds and method of using them
AssigneeEastman Kodak Company
InventorChang-Kyu Kim
Life of this patent
Estimating the term…
Abstract
Disclosed is a 5-acylamino-2-arylazo, nitro, or nitroso-4-substituted-phenol having the structural formula I: wherein: R* is an arylazo, nitro, or nitroso group, Y is a coupling-off group, and R′ is a substituent group. Also disclosed is a method of using the compound in a simplified process for making a photographic coupler.
Claims12
A 5-acylamino-2-arylazo, nitro, or nitroso-4-substituted-phenol having the structural formula I:
- wherein:
- R* is an arylazo, nitro, or nitroso group,
- Y is an aryloxy, arylthio, arylsulfonyl, or heterocyclic group, and
- R′ is a substituent group.
1 more element
Dependencies are inferred from the claim text.