http://rdf.ncbi.nlm.nih.gov/pubchem/patent/UA-9669-U
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9081a3187bee752398296a943a431add |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K19-20 |
| filingDate | 2005-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9809069ca4148aec5b43bea93ab00cd1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_08a87e2ee1a4394a74defb76b89a30d9 |
| publicationDate | 2005-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | UA-9669-U |
| titleOfInvention | A method for the preparation of 2,7-bis[4(4-n-alkoxybenzoyloxy)3-bromine-benzoyloxy]-naphtalenes |
| abstract | A method for the preparation of 2,7-bis [4(4-n-alkoxybenzoyloxy)3-bromine-benzoyloxy]-naphtalenes provides etherification of 2,7-dihydroxynaphtalene according to the carbodiimide method with use of N, N'-dicyclohexylcarbodiimide. The process is performed in four stages, at the first of which 4-hydroxybenzoic acid is dissolved in the acetic acid, adding bromine to the reaction mixture, the dropped residue is dissolved in the aqueous sodium hydrocarbonate, it is added hydrochloric acid and it is isolated 3-bromine-4-hydroxybenzioic acid. At the second stage 4-n-alkoxybenzoic acid is subjected to an interaction with thionylchloride in the presence of several drops of dimethylformamide, the thionyl excess is distilled and isolated with vacuum sublimation of obtained chloroanhydride of 4-n-alkoxybenzoic acid. At the third stage 3-bromine-4-hydroxybenzoic acid is subjected to the interaction with chloroanhydride of 4-n-alkoxybenzoic acid and isolated 4(4-n-alkoxybenzoyloxy)-3-bromobenzoic acid which is subjected to the interaction 2,7-dihydroxynaphtalene at the fourth stage in the presence of 4-dimethylaminopyridine in the medium of the absolute chloroform. To the reaction medium it is added N, N'-dicyclohexylcarbodiimide and isolated is target product being purified using the column chromatography. |
| priorityDate | 2005-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.