| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1437ae9db1ed46e46bb0fea6f52e76b6 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-0694
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-676
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-55 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-67
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-55
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-784 |
| filingDate |
1975-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1977-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_108f4483e3f0a4d0ac13ccd7825b5cf5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aa6021b9aa668e0594cc2ceab16155b3 |
| publicationDate |
1977-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4046814-A |
| titleOfInvention |
Preparation of diketones |
| abstract |
A method for preparing diketone starting materials useful in synthesizing tetraketone precursors for high temperature resistant polyquinoxaline resins. Dicarboxylic acid derivatives that contain no alpha hydrogens are contacted in the presence of a strong base with an active-hydrogen compound of the type R -- CH 2 -- X where R is an aryl, substituted aryl, heterocyclic or substituted heterocyclic radical and X is a nitrile group or a carboxylic acid functional group. A reaction intermediate is formed having the formula: ##STR1## wherein R and X are as defined in regard to the active-hydrogen compound and R' is the same as R. The reaction intermediate is hydrolyzed and decarboxylated to form the diketone. The diketones produced by the instant invention have the formula: ##STR2## where R and R' are the same as in the reaction intermediate. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9201662-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03042148-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4546184-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03042148-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4915335-A |
| priorityDate |
1975-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |