http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-982499-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bea23fc24859bc4382f3cd71d006cd4b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-03 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-773 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-76 |
| filingDate | 1963-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-982499-A |
| titleOfInvention | Improvements in or relating to the preparation of aryl esters of aromatic carboxylicacids |
| abstract | Aryl esters of carbocyclic, aromatic mono- and polycarboxylic acids are made by heating a methyl ester of such an acid in the presence of a transesterification catalyst with at least an equivalent amount of phenol, a naphthol or a phenol or naphthol substituted by one or more alkyl and/or aralkyl groups at a temperature above 160 DEG C., if desired under pressure, the methanol formed being continuously removed from the reaction mixture. The reaction is preferably carried out at 180-250 DEG C. with 2 to 6 mol. of the phenolic component per equivalent of methyl ester. Suitable catalysts are polyphosphoric acids, alkali metal hydrogen phosphates, alkali metal or alkaline earth metal hydroxides, or tertiary amines. Preferred are butyl titanate and the fatty acid salts of the metals of the second group of the Periodic Table, e.g. calcium stearate or the zinc salt of the first fraction of coconut fatty acids. Tin stearate is also suitable. Examples describe the preparation of (1) phenyl benzoate; (2) diphenyl terephthalate and methyl phenyl terephthalate; (3) diphenyl isophthalate and methyl phenyl isophthalate; (5) diphenyl 2,5-dichloroterephthalate (6) phenyl a -naphthoate; (7) the diphenyl and the methyl phenyl esters of 4,41-diphenyldicarboxylic acid; (8) phenyl p-toluate; (9) the triphenyl ester of trimellitic acid and the dimethylphenyl and methyldiphenyl esters; (10) di-p-cresyl and methyl-p-cresyl terephthalates; (11) m-cresyl p-toluate; (12) p-tert-butylphenyl p-toluate; (13) o-cresyl dibromobenzoate; (14) di-octylphenyl terephthalate; (15) dimethylphenyl terephthalate; (16) di-b -naphthyl terephthalate; (17) di-benzylphenyl terephthalate; (18) di-(4-butylphenyl) terephthalate; (19) di-o-cresyl methylterephthalate; p-benzylphenyl ester of 3-chloro-4-methylbenzoic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004000784-A1 |
| priorityDate | 1962-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 66.