http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112174897-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D239-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-0244 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D239-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-02 |
| filingDate | 2020-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-08-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-08-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112174897-B |
| titleOfInvention | Preparation method of azoxystrobin intermediate |
| abstract | The invention relates to the technical field of preparation of pesticide intermediates, and in particular relates to a preparation method of an azoxystrobin intermediate. A method for preparing an azoxystrobin intermediate, comprising the steps of: putting methoxymethylene benzofuranone and dichloropyrimidine in a solvent, adding alkali and a catalyst to carry out ring-opening reaction, adding alkali again to carry out etherification reaction, and synthesizing the azoxystrobin intermediate compound (E) -2- [2- (6-chloropyrimidine-4-methoxyl) phenyl]-3-methoxy acrylic acid methyl ester C, reaction formula: the structural formula of the catalyst is any one of the following structural formulas: the invention enables the reaction to selectively occur on the ring opening of the methoxymethylene benzofuranone, inhibits Michael addition, reduces the generation of a byproduct B, and simultaneously solves the problem of low efficiency of catalysts such as DABCO, trimethylamine and the like. |
| priorityDate | 2020-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.