http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1489695-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bb0a7b16a31bf7bc8b903ed8b717aab6 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C8-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C8-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C8-10 |
| filingDate | 1975-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1977-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1489695-A |
| titleOfInvention | Photographic dye diffusion transfer process |
| abstract | 1489695 Dialkoxy benzene derivatives AGFAGEVAERT AG 10 Feb 1975 [12 Feb 1974] 5475/75 Heading C2C [Also in Divisions G2 and C4] 2 - Acetamido - 5 - hexadecylsulphonamido. 1,4 - dimethoxybenzene is prepared by adding hexadecylsulphochloride at room temperature to 2 - acetamido - 5 - amino - 1,4 - dimethoxybenzene in anhydrous pyridine, diluting with a little water, pouring on to ice and acidifying with concentrated HCl. 2-Amino-5-hexadecylsulphonamido - 1,4 - dimethoxybenzene is prepared by refluxing the above product with concentrated hydrochloric acid in ethanol and cooling. 2 - Nitro - 1,4 - didodecyloxybenzene is prepared by adding dropwise nitric acid of density 1À39 at room temperature to hydroquinone didodecyl ether in glacial acetic acid. 2 - Amino - 1,4 - didodecyloxybenzene is prepared by catalytically hydrogenating the above nitro compound in tetrahydrofuran in the presence of nickel at 30-35‹ C./50 atmospheres pressure. 2 - Acetamido - 1,4 - didodecyloxybenzene is prepared by adding acetic anhydride to the filtered hydrogenation solution above and precipitating with 1-2 times the volume of acetonitrile. 5 - Nitro - 2 - acetamido - 1,4- didodecyloxybenzene is prepared by suspending the last compound in glacial acetic acid, adding dropwise nitric acid of density 1À39 at room temperature and adding further glacial acetic acid. 5 - Nitro - 2 - amino - 1,4 - didodecyloxybenzene is prepared by refluxing the last compound with concentrated HCl in ethanol, adding strong NaOH solution till alkaline and precipitating with plenty of water. 2,5-Diamino- 1,4 - didodecyloxybenzene is prepared by catalytically hydrogenating the last compound. |
| priorityDate | 1974-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 55.