http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103709071-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-20 |
| filingDate | 2013-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2016-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2016-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103709071-B |
| titleOfInvention | The preparation method of 3,4-difluorobenzonilyile |
| abstract | The invention discloses the preparation method of a kind of 3,4 difluorobenzonilyiles, it comprises the steps: (1) 1, and 2 difluorobenzenes and trichloro-acetic chloride react in the presence of lewis acid catalyst at 0～40 DEG C, synthesizes 3,4 difluoros (α, α, α tribromo-acetyl) benzene；(2) 3,4 difluoros (α, α, α tribromo-acetyl) benzene and ammonia react at 10～60 DEG C, obtain 3,4 difluorobenzamides；(3) 3,4 difluorobenzamides react at 30～80 DEG C with Halogen dehydrated reagent and catalyst, to obtain final product.The deficiencies such as instant invention overcomes in prior art the prices of raw materials expensive, intermediate toxicity is big, severe reaction conditions, reaction yield low-purity difference, are that one is prone to industrialization, easy and simple to handle, the synthesis technique of 3,4 difluorobenzonilyiles that yield is high and product purity is high. |
| priorityDate | 2013-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 66.