http://rdf.ncbi.nlm.nih.gov/pubchem/patent/HU-190489-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e9445e5e3626f36e932c6451a928250 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D- http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D487-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K- http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-3412 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D403-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B- http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B57-00 |
| filingDate | 1983-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8437a9aedf6f4ce7b8c49b990f2fd70e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e492c7266301ee319d66e8d6f2f73119 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b5e04abe39d529c19482e854eed62694 |
| publicationDate | 1986-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | HU-190489-B |
| titleOfInvention | PROCEDURE FOR PREPARATION OF PIRROLO | 3,4-CYPRUS |
| abstract | The process is 1,4-diketopyrrolo [3,4-] pyrrole of formula (I)nwhich arenwherein R 1 and R 2 are independently of one anothernunsubstituted or mono or halogenndisubstituted C 1-4 alkylnmono- or disubstituted, C 1-4nalkoxy, (C 1 -C 4) alkoxycarbonyl, cyano,ntrifluoromethyl, di (1-4C) alkyl,nC 1-4 alkylthio, phenylthio, phenoxy, phenylnor a phenyl group monosubstituted with cyanophenyl,nnaphthyl, furyl or thienyl;nunsubstituted or C 1-8 alkoxynsubstituted pyridyl. The procedurenis performed in such a way that 1 mole is asymmetricnor symmetric succinic acid (1-8 alkyl) -nester, succinic diphenyl ester or succinic acid dicyclohexyl esternorganic solventnin alkali metal, alkali metal alcohols or alkali metalsnin the presence of a strong base, at a temperature of 60-140 ° C,nif Rt and R2 have the same meaning, (II) or (III)nwith 2 moles of nitrile of formula II or when R 2 and R 2nhaving different meanings, 1 mol of Formula II and 1nmole is reacted with nitrile of formula IIInthe resulting reaction product is of formula (I)nthe compound is liberated by acid hydrolysis. |
| priorityDate | 1982-05-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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