http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5928851-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D487-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C7-30541 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C7-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D487-04 |
| filingDate | 1997-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1999-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f726f9dc4a1bdb326126e35bd8af47b |
| publicationDate | 1999-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5928851-A |
| titleOfInvention | Photographic couplers which release useful groups anchiomerically and their synthesis |
| abstract | The present invention describes an image dye-forming coupler of formula (I) wherein L is an oxymethylene or oxycarbonyl group; n is 0 or 1; COUP is a coupler moiety and R1 and R2 are the same or different and are groups selected such that (a) together with the nitrogen atom a good leaving group is formed; (b) at least one of them contains a PUG linked to an electrophilic center (E); and (c) neither R1 nor R2 is a hydrogen atom wherein the coupler is a DIAR coupler from which inhibitor is released from a coupling-off group after a timed delay which results from an additional reaction step. Such delay permits control over the time of release, rate of release and rate of diffusion of a photographically useful group (PUG) without altering the nature of the PUG itself. A method of preparing the coupler is also described wherein the two parts of the molecule can be built up separately and combined in a single reaction allowing ready access to a large variety of possible structures. |
| priorityDate | 1996-06-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 381.