http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-779735-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dc2f7134efa50484bb359fda73782848 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C62-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C62-32 |
| filingDate | 1953-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-07-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-779735-A |
| titleOfInvention | Manufacture of new hydrophenanthrene-carboxylic acids and derivatives thereof |
| abstract | The invention comprises 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8-octahydrophenanthrene - 2 - carboxylic acids containing in the 7-position a free hydroxyl group, in the 1-position an akyl group containing 1 to 3 carbon atoms, and which may be substituted in the 2-position by an alkyl group containing 1 to 3 carbon atoms, and the preparation thereof by treating the required tetrahydrophenanthrene-2-carboxylic acid having aromatic rings A and B with hydrogen in the presence of a nickel catalyst and a strongly basic agent such as an alkali metal hydroxide-particularly potassium hydroxide, at an elevated temperature and pressure and, if desired, converting the resulting 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8-octahydrophenanthrene-2-carboxylic acid which may be substituted as above into an alkyl ester or an ammonium, alkali metal or alkaline earth metal salt thereof. In the examples: (1) 1-ethyl-2-methyl - 7 - hydroxy - 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8-octahydrophenanthrene - 2 - carboxylic acid is prepared from 1 - ethyl - 2 - methyl - 7 - hydroxy - 1 : 2 : 3 : 4 - tetrahydrophenanthrene - 2-carboxylic acid by treatment with hydrogen in the presence of Rupe nickel and potassium hydroxide at an elevated temperature and pressure, and is converted into the methyl ester thereof; 1 : 2 - dipropyl - 7 - hydroxy - 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8 - octahydrophenanthrene - 2-carboxylic acid may be similarly prepared; (2) 1 - ethyl - 7 - hydroxy - 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8-octahydrophenanthrene-2-carboxylic acid is prepared as in (1). |
| priorityDate | 1952-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.