http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4224252-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_33dafb5bbc2ec47ebcb7becbbe60f704 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-45 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-45 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-60 |
| filingDate | 1979-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1980-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2c6583d51c1aba42c4672564b6e79597 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fdd714ec122111e6c8fc7125e6374321 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ab72292aba4846062aba9f5b625e811a |
| publicationDate | 1980-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4224252-A |
| titleOfInvention | Production of pinacolone |
| abstract | Disclosed are improved procedures for preparing pinacolone from compounds of general formula (I) <IMAGE> (I) wherein, either adjacent two of A, B, C and D form a single bond between them and the remaining two are hydrogen atoms, or both A and D are hydrogen atoms and one of B and C is a hydrogen atom and the other represents OH, Cl, Br, HSO4, H2PO4 or ClO4, and a new procedure which enables preparing pinacolone from a compound of general formula (II) <IMAGE> (II) wherein, both W and Y are each hydrogen atoms and X and Z are the same or different and each represents OH, Cl, Br, HSO4, H2PO4, ClO4 or RCOO wherein R is a hydrogen atom or an alkyl group of 1 to 3 carbon atoms, or one of W and Y is a hydrogen atom and the other forms a single bond together with X, and Z represents OH, Cl, Br, HSO4 H2PO4, ClO4 or RCOO where R is defined as above. In the process of preparing pinacolone from compounds of formula (I) by reacting them with formaldehyde in the presence of a strong inorganic acid, the process can be improved by adding a salt of a strong inorganic acid, or a compound of formula (II). Pinacolone can also be produced by heating a compound of general formula (II) in the presence of a strong inorganic acid and this reaction, too, can be improved by the addition of a salt of a strong inorganic acid. The use of a salt of a strong inorganic acid according to the invention makes it possible to reduce the concentration and the amount of strong acid normally required, and to improve the yield of pinacolone. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11565984-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4528400-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106365964-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108164405-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022233339-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2022111456-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114507125-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4570021-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4384145-A |
| priorityDate | 1978-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 240.