| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b172e4dc6f8b115773eb99a04e8260f6 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D309-28 |
| filingDate |
1984-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5188c9a3260b2a259a76c011d94270d4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb7e0933b8792ce8683b96dc6fd7cc8c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9764b72eef0b22a9c0f34cfa311bdc03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e0384e85018feecf912c6cfe0b90a1ca
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c80de473a603ce46a7cecf288057980b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_51ba164c7e578ea7f94d48bfa06334be |
| publicationDate |
1989-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DD-266709-A3 |
| titleOfInvention |
PROCESS FOR PREPARING 2-METHYL-5,6-DIHYDRO-PYRAN-3-CARBOXYLIC ACID ESTERS |
| abstract |
The invention relates to a process for the preparation of 2-methyl-5,6-dihydro-pyran-3-carboxylic acid esters, which are used in the pharmaceutical industry as valuable intermediates application. The object of the invention, a technically simple method for preparing the target compounds without the use of expensive condensing agent is achieved by the acetoacetate in a preferably aprotic dipolar solvent or a solvent mixture of such a solvent and a preferably inert organic solvent with 1,3-dihaloalkanes in the presence of alkali metal hydroxide. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011108001-A3 |
| priorityDate |
1984-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |