http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-453593-A1
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> |
| publicationDate | 1977-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-453593-A1 |
| titleOfInvention | A PROCEDURE FOR THE PREPARATION OF BENZOPYRANE DERIVATIVES. |
| abstract | A process for the preparation of benzopyran derivatives of formula I **(See formula)** wherein (i) R5 is hydroxy or hydrogen, R7 is hydrogen, and R6 and R8 are the same, are both ethyl or are both t-butyl, or (ii) one of R5 R6, R7 and R8 is of the formula V, **(See formula)** wherein X represents a hydrocarbon chain optionally substituted by an -OH group and containing from 2 to 10 carbon atoms, and the remainder of R5, R6, R7 and R8 are all hydrogen, or one of its pharmaceutically acceptable derivatives, comprising dehydrating a compound of formula II **(See formula)** or one of its esters, in which R5a, R6a, R7a and R8a have the same meaning as R5, R6, R7 and R8 above, except that one of R5a, R6a, R7a and R8a may be a group of formula **(See formula)** or one of its esters, X is as defined above, and one of each pair of A and B is hydrogen and the other is hydroxy, and when it is desired or necessary to convert the resulting compound of formula I is one of its derivatives pharmaceutically acceptable. (Machine-translation by Google Translate, not legally binding) |
| 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: 15.