| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b986f13442054468f5a842670bc6b257 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C275-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-1809
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-1854
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D295-215 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D295-215
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D295-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N47-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-40 |
| filingDate |
1992-08-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b0665f25ee02fb8d7c455e837f09e505
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a5a1b64a29257c749ba9fbb65fab501b |
| publicationDate |
1993-03-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0531689-A1 |
| titleOfInvention |
Process for the preparation of pure N,N'-asymmetrically substituted phenylureas |
| abstract |
A process for the preparation of very pure ureas of the formula phenyl- (NH-CO-NR₁R₂) n in the phenyl, an optionally substituted phenyl or phenylene group and R₁ and R₂ are either the same and each an alkyl group, or different, where R₁ is a hydrogen atom and R₂ is an alkyl or phenyl group or R₁ and R₂ together with the nitrogen atom represent a heterocyclic ring and n is the number 1 or 2, by reacting a phenylurea of the formula phenyl- (NH-CO-NH₂) n with an amine of the formula NR₁R₂H in one under the reaction conditions inert diluents at temperatures from 100 to 200 ° C, the reaction being stopped before by-products are formed and the urea formed is separated from the starting compounds and the unreacted starting compounds are used again in the process. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5380941-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0590555-A1 |
| priorityDate |
1991-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |