http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109233323-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D333-60 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D333-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-16 |
| filingDate | 2018-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109233323-B |
| titleOfInvention | Preparation method of disperse blue 354 |
| abstract | A preparation method of disperse blue 354 is characterized by comprising the following steps: the method comprises a preparation step of a compound Ib, wherein in the step, methanol is used as a solvent, and a compound Ia and malononitrile are reacted in a mass ratio of 1:0.4-0.5 in the presence of piperidine, wherein the reaction temperature is 45 ℃ to the reflux temperature of the methanol. The step can reduce the dosage of malononitrile, has mild reaction conditions, reduces the generation of harmful substances, and has good product purity and high yield. The method has low cost of starting raw materials and high total yield. |
| priorityDate | 2018-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.