http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5473781-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_33dafb5bbc2ec47ebcb7becbbe60f704 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C41-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-315 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D309-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 |
| filingDate | 1977-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb0efafb2c58ae022bcddd9c28ba94ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c8205eb919e20a5c0aaef043db9125f2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d68cc478630e9cd2fdf8f8116891fb8 |
| publicationDate | 1979-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5473781-A |
| titleOfInvention | Preparation of 2-alkyl-4h-pyran-4-one |
| abstract | PURPOSE: To obtain the title compound usable as an intermediate for synthesis of hipnotics, antibacterials, flavoring agents, etc., by treating a novel 5-alkyl-1,5,5- trialkoxy-1-pentene-3-yne with an acid in the presence of water. n CONSTITUTION: An 1-alkoxy-1-butene-3-yne of formula III: (R 3 is lower alkyl group) is reacted with an orthocarbonate of formula IV: (R 1 and R 2 are the same or different lower alkyl groups) in the presence of a Friedel-crafts type metallic halide catalyst, e.g. Zinc chloride, aluminum chloride, etc. at 40W200°C, preferably 80W90°C in an atmosphere of nitrogen to give an 5-alkyl-1,5,5-trialkoxy-1-pentene- 3-yne of formula II, which is then treated with a catalytic amount of an acid, e.g. hydro chloric, methanesulfonic acids, etc. in an equivalent amount or more of water or hydrous organic solvent to form the compound of formula I. n COPYRIGHT: (C)1979,JPO&Japio |
| priorityDate | 1977-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.