http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8030529-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8c8dbcf50fe783c0e155cbd9cc1d92c5 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-093 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C25-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07B39-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-00 |
| filingDate | 2006-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2011-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f548a59822f51f6ece20cc09bb613c6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8bf7eac4249d89f1825bd7cd2f2a0762 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8a6d4062d19e798b3ac0bc853c32e69f |
| publicationDate | 2011-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-8030529-B2 |
| titleOfInvention | Process for the preparation of intermediates |
| abstract | The present invention provides a process for the production of intermediate compounds of formula (I), wherein the substituents are as defined herein. The process comprises reacting a substituted aniline with aqueous HX, followed by removal of water by azeotropic distillation and diazotization and pyrolysis with an organic nitrite at elevated temperatures in the absence of a copper catalyst. Alternatively, gaseous HX can be used to substitute aqueous HX in the process. Consequently, a step of water removal by azeotropic distillation can be eliminated. The intermediate compounds of formula I are suitable as intermediates in the preparation of herbicidally active 3-hydroxy-4-aryl-5-oxopyrazoline derivatives. |
| priorityDate | 2005-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 276.