http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2834378-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D309-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11B9-008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C43-303 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D309-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D319-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D309-10 |
| filingDate | 2015-04-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0329b8c38dd3a4df08917af6ab30161a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0d9ed0aae4278bae8a83f3500c8ef29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_877f5666f7a789600c41a3e0e535f568 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_196aad824ffe9040e64ee18c686fa95d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ce990212c3a666822a12c654b9ee6e5e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2b99c00ea282b99cb0cc49e2264618ef |
| publicationDate | 2021-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2834378-T3 |
| titleOfInvention | Preparation of 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans with stable quality of odoriferous substance |
| abstract | Process for the preparation of 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans, of the general formula (I) ** (See formula) ** in which R1 represents straight or branched chain C1-C12 alkyl, alkenyl C2-C12 straight or branched chain, cycloalkyl unsubstituted or substituted with C1-C12 alkyl and / or C1-C12 alkoxy with a total of 3 to 20 carbon atoms or aryl unsubstituted or substituted with C1-C12 alkyl and / or C1-C12 alkoxy with a total of 6 to 20 carbon atoms, in which a) 3-methylbut-3-en-1-ol of formula (IV) ** (See formula) ** is reacted with a aldehyde of the formula (V) R1-CHO (V) in which R1 represents straight chain or branched C1-C12 alkyl, straight chain or branched C2-C12 alkenyl, unsubstituted or C1-C12 alkyl substituted cycloalkyl and / or C1-C12 alkoxy with a total of 3 to 20 carbon atoms or aryl unsubstituted or substituted with C1-C12 alkyl and / or C1-C12 alkoxy with a total of 6 to 20 carbon atoms, in the presence of a catalytic acidizer, where a reaction mixture is obtained containing at least 4-hydroxy-4-methyl-tetrahydropyran substituted in position 2, of the general formula (I), b) the reaction mixture of step a) is subjected to a separation by distillation, to obtain at least a fraction enriched in the 4-hydroxy-4-methyl-tetrahydropyrans substituted in position 2, of the general formula (I), wherein the reaction mixture of step a), before the use in stage b) and / or during use in stage b), it is brought into contact with an acidic ion exchanger and / or a strong acid is added. |
| priorityDate | 2014-04-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 91.