| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_78aa26f74f74c203e4b3f951d029ff5d |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-825
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D493-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-86 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D493-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-825
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-46 |
| filingDate |
1976-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1978-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a72f3a0020e5a37c6d07db6938b461fd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_588a4fd913cb968fb393a296029b1f9e |
| publicationDate |
1978-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4129576-A |
| titleOfInvention |
Process for making ω-chloro-2,3,4-trihydroxyacetophenone |
| abstract |
8-Methoxypsoralen is prepared in six steps from pyrogallol including condensation of pyrogallol with a two-fold excess of chloroacetic acid with boron trifluoride hydrogenation of 6,7-dihydroxy-2,3-dihydrobenzofuran and dehydrogenation of 2,3-dihydroxanthotoxin. Improvements in these three steps lead to a marked overall increase in yield. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102030757-A |
| priorityDate |
1976-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |