http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DD-277076-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_eab56e4fe8837840887f41af83e328ee |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D491-052 |
| filingDate | 1988-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f5c856f8cd0731fdf77ae615a27c9d53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6df5fde6fe66371afc9ee794be1f8ce3 |
| publicationDate | 1990-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DD-277076-A1 |
| titleOfInvention | PROCESS FOR PREPARING SUBSTITUTED CUMARINO [3,4-D] PYRAZOLES |
| abstract | The invention relates to the field of organic synthetic chemistry and has as its object to develop a method according to the substituted Cumarino & 3,4-d! Pyrazole IV, in which R1 to R4 are identical or different hydrogen, alkyl, aryl, hetaryl or heterocycloalkyl radicals, a hydroxy or alkoxy group, a halogen, nitro or amino function or in each case two adjacent substituents R 1 to R 4 together form an aromatic ring and R 5 is an arbitrary alkyl, aryl or hetaryl radical can be prepared. The stated object is achieved by reacting substituted 4-chloro-3-formyl-coumarins of the formula I, in which R 1 to R 4 have the same meaning as above, with sodium azide in DMF at about 0-5 C, the precipitated one Azide of the formula II with substituted hydrazines of the formula III, in which R5 has the same meaning as above, at elevated temperature, the product separated by the addition of water separated product of formula IV and after drying from a polar organic solvent, preferably acetonitrile, recrystallized. Depending on the substituent pattern, compounds of type IV can be used as fluorescent and laser dyes or represent potential drugs. Formulas I to IV |
| priorityDate | 1988-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.