http://rdf.ncbi.nlm.nih.gov/pubchem/patent/HU-202185-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e752c83f437681dc056d7e37f070dec3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-38 |
| filingDate | 1986-07-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a93e72a8e1a84056a7274028aabf94d8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_75206dd64465411d7b98ec015a56932b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_20cf62d15ec0943f52c4624eb4d91a90 |
| publicationDate | 1991-02-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | HU-202185-B |
| titleOfInvention | Process for producing phenyl- and benzyl-malonic acid and their ester-derivatives |
| abstract | The present invention relates to a process of the general formula (I) wherein R1, R2 are hydrogen or C1-C4 alkyl, Z is hydrogen ion or an alkali metal ion, R is optionally C1-C4 alkyl, C1-C4 alkoxy or \ t phenyl, monosubstituted by a nitro group, or phenyl (1-4C) alkyl optionally substituted by C1 -C4 alkoxy, for the preparation of their malonic acid and / or ester derivatives, by the use of a cyanoacetic acid ester derivative of the formula (II): in which R1, Z, R are as defined above, in the presence of the above-mentioned C1-C4 alcohol, in the presence of a dry or concentrated mineral acid, or in the alkyl ester of two or more polar mineral acids: alkanol: acid = 1: (3-4): (2) , 5-3.5) and (II): alkanol: acid alkyl ester = 1: (2-3): (1.5-2.5) molar ratio of -10 to +120 'C and given the product without fractionation malon ester derivative: alkanol: alkali metal hydroxide = 1: (10-20): (2.5-5) molar ratio 0-40 ° C is hydrolyzed to an acid derivative to an alkali salt and converted to acid by a method known in the art after separation. COOR, ι 'R-C-Z I coor2 I Scope of the description: 5 pages, 1 drawing CN ι R-C-Z I COOR II 1 [2] EN 202185 B -1- |
| priorityDate | 1986-07-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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