Positive-working immobile intramolecular nucleophilic displacement compounds and photographic elements containing same

US4278598A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Gerald C. Hinshaw · Penfield, US
• Paul B. Condit · Pittsford, US

Key dates

• Filing date: Sep 1, 1976
• Grant date: Jul 14, 1981
• Expiry date: Sep 1, 1996

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C8/10
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Novel photographic dye release compounds have the structure: ##STR1## wherein R.sup.1 is an aromatic group containing 5-7 members in the ring to which Nu and E are attached; R.sup.2 and R.sup.3 are bivalent organic groups containing from 1-3 atoms in the bivalent linkage which are alkylene, oxyalkylene or thiaalkylene; Nu is a nucleophilic group which is a hydrazine, an hydroxyamino, an hydroxy, a sulfonamido, a primary amino or alkali-labile precursors for said nucleophilic groups; E is an electrophilic group which is a carbonyl or a sulfonyl; Q is a bivalent group providing a mono atom linkage between E and X.sub.2 and is amino providing a mono atom nitrogen linkage, an oxygen atom, a sulfur atom or a selenium atom, provided that Nu and E are positioned on a ring of said aromatic group to provide for intramolecular formation of a 5- to 7-membered ring between Nu and E displacing Q--X.sub.2 from E; one of X.sup.1 or Q--X.sub.2 is a ballasting group containing at least 8 carbon atoms, which ballasting group is of a size sufficient to render said compound immobile in an alkaline solution-permeable layer of a photographic element; one of X.sup.1 or Q--X.sub.2 is an azo dye, an azomet…