http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S57126488-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_39ae96c0ecc22ff90ff986371a3cea0f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P37-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-425 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D417-12 |
| filingDate | 1981-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aa4c63dc3e98abcca8ade201807c6fcc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_455fccc74ca2211fbbe7d2b67ba21e0f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef3fca81aecb66bf8abcb6f30dff0cf8 |
| publicationDate | 1982-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S57126488-A |
| titleOfInvention | Preparation of chromone-2-carboxylate |
| abstract | NEW MATERIAL:A compound shown by the formulaI(R 1 is lower alkylene; R 2 is lower alkyl; X is halogen). n EXAMPLE: 5-[2-2-Oxo-5-chlorobenzothiazoline-3-yl)ethoxy]chromone-2-carboxylic acid ethyl ester. n USE: An antiallergic. n PROCESS: A novel acetophenone shown by the formula II is reacted with an oxalic acid derivative to give a reaction product, which is subjected to ring closure in the presence of an acid under heating, to give a compound shown by the formulaI. An oxalic acid lower dialkyl ester, a glyoxalic acid lower alkyl ester, etc. may be used as the oxalic acid derivative. The compound shown by the formula II, for example, is obtained by reacting dihydroxyacetophenone with a corresponding substituted alkyl halide. n COPYRIGHT: (C)1982,JPO&Japio |
| priorityDate | 1981-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.