http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112341392-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-08 |
| filingDate | 2019-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112341392-B |
| titleOfInvention | Process for preparing 1- (4-chlorophenyl) -pyrazolidin-3-one |
| abstract | The invention relates to the field of bactericide synthesis, and discloses a method for preparing 1- (4-chlorphenyl) -pyrazolidin-3-ketone. The method comprises the following steps: 1) reacting parachloroaniline with acrylic acid to obtain an addition reaction product; 2) purifying the addition reaction product and then carrying out a nitrosation reaction with nitrite, or directly carrying out a nitrosation reaction on the addition reaction product and nitrite to obtain a nitrosation reaction product; 3) reducing by using palladium carbon as a catalyst and hydrogen as a reducing agent to obtain a reduction product; 4) and (3) removing the catalyst from the reduction product, and then carrying out heat treatment to obtain the 1- (4-chlorphenyl) -pyrazolidin-3-ketone. According to the method disclosed by the invention, steps such as diazotization, sodium sulfite reduction and the like are avoided, the reaction safety is high, the amount of three wastes is small, and the method is suitable for industrial production. |
| priorityDate | 2019-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.