http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02306945-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d3f3715de490e1bb21776ddfd16835f6 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C233-65 |
| filingDate | 1989-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_494bd394f03f9b51d5e24b160cc36608 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ddc68e9c6b47caf601228f9351d77ced http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_adc40fe4b6cedcbbc0f7d66cad7d6704 |
| publicationDate | 1990-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02306945-A |
| titleOfInvention | Production of tetrafluorophthalic anhydride and its derivative |
| abstract | PURPOSE: To easily dehydrate tetrafluorophthalic acid to form tetrafluorophthalic anhydride simply by heating the acid in a specific solvent and to obtain various derivatives useful as intermediate raw materials for pharmaceuticals, agricultural chemicals, photo-sensitive materials, etc., by using the anhydride as a starting raw material. n CONSTITUTION: Tetrafluorophthalic acid of formula I is heated in an organic solvent inert to the compound of formula I and tetrafluorophthalic anhydride to obtain tetrafluorophthalic anhydride of formula II. The anhydride is made to react with NH 3 and then with an alkaline substance to obtain a 2- carbamoyl-3,4,5,6-tetrafluorobenzoic acid salt of formula III which is a new compound. A tetrafluoroanthranylic acid salt of formula N can be easily produced by the Hofmann rearrangement reaction of the compound of formula III with a hypohalous acid salt and an alkaline substance. The compound of formula IV can be easily decarbonated by heating in a solvent to form 2,3,4,5- tetrafluoroaniline of formula VI in high yield. n COPYRIGHT: (C)1990,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7700647-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5200556-A |
| priorityDate | 1989-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.