http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2001051734-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e3515a9c37b42efec8cdf96252b9643e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-716 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-716 |
| filingDate | 2001-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d9b7893b94719e99199273a3a7334cf1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bdd295e26f3899e05fde5e60c52bdf47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a31ab5316885c0248414e55d0838f820 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_464fd404894430e7b315472d2147718c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_83e50b91ab0cc81d5c6e40a3dbef10e5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d166923f6934caacb92a3d66ec4c6e2e |
| publicationDate | 2001-12-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2001051734-A1 |
| titleOfInvention | Methods for making 2-(omega-alkoxycarbonylalkanoyl) -4-butanolide, ester of omega-hydroxy- (omega-3) - ketoaliphatic acid, and derivatives thereof |
| abstract | In industrial production of ω-hydroxyaliphatic acid being an important intermediate for large cyclic lactone-based perfumes, using dicarboxylate ester which is inexpensive and readily obtainable, a method, with high yield and improved selectively, for making a 2-(ω-alkoxycarbonylalkanoyl)-4-butanolide and an alkaline metal salt thereof, an ester of ω-hydroxy-(ω-3)-ketoaliphatic acid as a novel compound and a derivative thereof, and a method for making the same are provided. n Condensation reaction of γ-butyrolactone with a dicarboxylate ester represented by the general formula (1) ROOC(CH 2 )nCOOR wherein n is an integer of 7 to 13 and R is an alkyl group forms a condensation solution containing an alkaline metal salt of 2-(ω-alkoxycarbonylalkanoyl)-4-butanolide represented by the general formula (3): n n n wherein n is an integer of 7 to 13, R is an alkyl group, and M is an alkaline metal; the solution is extracted with water or an aqueous alkaline solution and subjected to hydrolysis and decarboxylation to form an alkaline metal salt of ω-hydroxy-(ω-3)-ketoaliphatic acid represented by the general formula (5): n n n wherein n is an integer of 7 to 13 and M is an alkaline metal; and the compound is selectively and effectively separated and recovered and then acidified to form an ω-hydroxy-(ω-3)-ketoaliphatic acid represented by the general formula (10): n n n wherein n is an integer of 7 to 13. |
| priorityDate | 1997-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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