http://rdf.ncbi.nlm.nih.gov/pubchem/patent/HU-187351-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_69c91bbf0395db010b4806f50d808c4e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-36 |
| filingDate | 1981-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0fdd2cfa7c0b0001c5bfa2024251e4cc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac9fb4cf375df2dae3a277feb6554294 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bf7181dae629fa54a1d26cd4fccd1bf3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b1c35bcb459943fa26fb5406c440185d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_071e6a28f9f1321c6be1969cfea561d9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b32f3fc18a8e6d565bc3e7cb7732df33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2abbb81e89666719c0cc0eb016126347 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6518e6a0978079d45fd5d9c4c081877f |
| publicationDate | 1985-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | HU-187351-B |
| titleOfInvention | Process for producing pyrazolidine-dion derivatives |
| abstract | The present invention relates to a novel process for the preparation of 1,2-diphenyl-4- [2 (phenylthio) -ethyl] -3,5-pyrazolidinedione in the presence of malonic acid dialkyl ester and 1,1'-dihalethane in the presence of an alkali metal alkanolate and the resulting \ t reacting cyclopropane-1,1-dicarboxylic acid dialkyl ester with thiophenol and then reacting the resulting 2- [2 (phenylthio) ethyl] malonic acid dialkyl ester with 1,2-diphenylhydrazine such that the malonic acid dialkyl ester and 1 The 3-component ester mixture obtained by reacting 2-dihaloethane in the presence of an alkali metal alcoholate is reacted with thiophenol and the resulting 2- [2- (phenylthio) ethyl] malonic acid dialkyl ester, malonic acid dialkyl ester, and butane-l, 4.4 distillation of the malonic acid dialkyl ester from a mixture of tetracarboxylic tetraalkyl esters, and selectively reacting the remaining two-component mixture with 1,2-diphenylhydroxy in the presence of alkanol, preferably butanol. recovered. The compound of the present invention is a production intermediate of sulfinpyrazone. -1- |
| priorityDate | 1981-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 63.