Phenylmercaptoazole compounds
US4355101A · kind A · utility
8Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1981 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Jan 5, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Novel compounds which are represented by the formula ##STR1## wherein X represents the nonmetallic atoms necessary to form a nucleus which completes a 5- or 6-membered heterocyclic moiety, R is a group which is cleavable in aqueous alkaline medium and R.sub.1 is either a group which has a pKa of from about 7 to about 14 which is ionizable to an anion and wherein the silver salt of the mercaptan resulting from cleavage of -SR is rendered more soluble in the pH range within which R.sub.1 is ionized to an anion than it is below that pH range or a precursor of such a group. The compounds are useful in photographic applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.