http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113024385-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C241-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-54 |
| filingDate | 2021-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113024385-B |
| titleOfInvention | A kind of preparation method of 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl |
| abstract | The invention discloses a preparation method of 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl, comprising the following steps: S1, using m-nitrotrifluorotoluene and hydrazine hydrate as raw materials , using low-boiling alcohols as solvent, under the catalysis of inorganic base and palladium carbon, at 40-76 ℃, through catalytic reduction reaction to prepare 3,3'-bis (trifluoromethyl) diphenylhydrazine; S2, in the protection Under a gas atmosphere, 3,3'-bis(trifluoromethyl)diphenylhydrazine prepared by S1 was added to an inorganic acid, and at -10-20 ℃, through a rearrangement reaction, 2,2'-bis(trifluoromethyl) was prepared. Fluoromethyl)-4,4'-diaminobiphenyl; the present invention uses hydrazine hydrate instead of hydrogen as the reducing agent, the amount of hydrazine hydrate is small, the reaction conditions are mild, the requirements for equipment are low, and the amount of catalyst is small, which can be applied mechanically, lower cost. |
| priorityDate | 2021-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.