http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3873574-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e2ed31ee9354301da12dc9a7e9e03df1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11B9-008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D315-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11B9-00 |
| filingDate | 1974-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1975-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4ee5423534ecec89721a413110dfa700 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c8e52f2e8cc6dbf1d5bc4ae9db4c3e13 |
| publicationDate | 1975-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3873574-A |
| titleOfInvention | Process for preparing substituted alpha-pyrones |
| abstract | A process is described for the preparation of 6-alkyl-alphapyrones which comprises the steps of: I. ACYLATING AN ALKYL-3-BUTENOATE ESTER HAVING THE FORMULA: WITH AN ACYLATING AGENT HAVING THE FORMULA: IN THE PRESENCE OF A Friedel-Crafts catalyst to produce a novel mixture of two keto-esters having the formulae: II. OPTIONALLY SEPARATING SAID MIXTURE INTO ITS INDIVIDUAL KETOESTERS; III. CONTACTING SAID MIXTURE OF KETO-ESTERS OR ONE OF THE INDIVIDUAL COMPONENTS THEREOF WITH A SOLID, HEAT RESISTANT CATALYST SUCH AS COPPER, STAINLESS STEEL, NICKEL OR STONE AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 450*C up to about 600*C, thereby forming a 6-alkyl-alpha-pyrone having the formula: WHEREIN R1 is C1-C10 alkyl, R2 is lower alkyl and X is chloro or bromo. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2803847-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0151481-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5443971-A |
| priorityDate | 1974-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 90.