http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CH-618435-A5
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c1cd6051bf69f25a0652ded4e4edac31 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-24 |
| filingDate | 1976-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fcb7266f5eee300c8e7d27744315a38c |
| publicationDate | 1980-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CH-618435-A5 |
| titleOfInvention | Process for the preparation of benzopyran derivatives |
| abstract | The compounds of formula I in which 1) R5 is a hydroxyl group or a hydrogen atom, R7 is a hydrogen atom and R6 and R8, which are identical, are both ethyl groups or both t-butyl groups, or 2) one from R5, R6, R7 and R8 has the formula V in which X is a hydrocarbon chain optionally substituted by an -OH group and containing from 2 to 10 carbon atoms, and the symbols remaining from R5, R6 and R8 are all hydrogen atoms, or one of its pharmaceutically acceptable salts or esters, are prepared by dehydration of a corresponding 2-hydroxy-3-hydro or 2-hydro-3-hydroxy compound. The compounds of formula I are known antiallergic medicaments. The new process makes it possible to obtain them in a purer state and under more certain and more economic conditions than by the prior processes. <IMAGE> <IMAGE> |
| priorityDate | 1975-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.