| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-885 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-885 |
| filingDate |
1976-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1977-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_02aa955ba46d0e91cc153da08096b711 |
| publicationDate |
1977-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4052415-A |
| titleOfInvention |
Manufacture of lactones of the triphenylmethane series |
| abstract |
A process for the manufacture of ##STR1## where R and A are identical or different and each is alky of 1 to 4 carbon atoms, by oxidation of ##STR2## with air, oxygen or mixtures thereof, in an acid medium at a pH of from 1.5 to 5.5, at from 30° to 150° C. The reaction takes place rapidly and gives a good yield of the lactone (I), which can be freed from residual (II) by a treatment with alkali. The compound (I) is used as a dye intermediate in no-carbon copying systems. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AT-381938-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4233223-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4399291-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AT-380018-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4271075-A |
| priorityDate |
1975-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |