http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110938052-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2312575a894ab54cfff944727775f7a3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-24 |
| filingDate | 2018-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e09b30972a6783fad924a039c5563c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6343bd0ba90e2d2b791cb518054a3a35 |
| publicationDate | 2020-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110938052-A |
| titleOfInvention | A kind of industrial preparation method of anti-asthma drug Prankast intermediate |
| abstract | The invention discloses a pranlukast intermediate N-(2-cyano-4-oxo-4 H -chromene-8-yl)-4-(4-butoxyphenyl)benzamide ( Referred to as the preparation method of formula one), the method specifically refers to 4-oxo-8-[4-(4-butoxyphenyl)benzamide]-4H-chromene-2-formamide (referred to as formula two) through Dehydration reaction to prepare N-(2-cyano-4-oxo- 4H -chromene-8-yl)-4-(4-butoxyphenyl)benzamide. The preparation method of the Prankast intermediate formula 1 has the advantages of high yield, good color and high purity, which is favorable for industrial production. |
| priorityDate | 2018-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.