http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1159039-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b067fdd3cb663bf26352a94741dd4e9a |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12C3-12 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12C5-008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-42 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-743 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-493 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12C5-02 |
| filingDate | 1965-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76b2ab40b6789d42617d961e77e6be4c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_27ff5fcea6361c69558effde9486272c |
| publicationDate | 1969-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1159039-A |
| titleOfInvention | Cyclopentadione Derivatives and processes for the production thereof |
| abstract | 1,159,039. Cyclopentadione derivatives. BREWING PATENTS Ltd. 28 Nov., 1966 [29 Nov., 1965], No. 50635/65. Heading C2C. [Also in Division C5] The invention comprises cyclopentadione derivatives of the formula in which R<SP>2</SP> and R<SP>3</SP> denote hydrogen atoms, or alkyl groups of 1-3 carbon atoms, R<SP>5</SP> denotes an alkyl group of 1-4 carbon atoms and R<SP>6</SP> denotes an alkyl or alkenyl group of 1-6 carbon atoms. The compounds are obtained by alkylating or alkenylating compounds of the formula which may be obtained by hydrolysis of the corresponding acyl compounds. The products yield isohumulone, isocohumulone, isoadhumulone and like products of the formula when treated with a suspension of a mercuric salt under acid conditions, and these last products are useful in the embittering of beer. Examples are given. The preparation of intermediates for the process is described, as follows #-Ketoesters of the formula in which R<SP>7</SP> denotes a hydrogen atom or a carboxylic acyl group and Alk denotes an alkyl group of 1-4 carbon atoms, from which compounds of Formula (II) above are obtainable by ring closure, are themselves obtainable by condensing a #-ketoester of the formula R<SP>5</SP>-CO-CH 2 -CO-OAlk with a substituted lactic acid halide of the formula in which Hal denotes a chlorine or bromine atom, in the presence of magnesium or a magnesium alkoxide. Substituted lactic acids from which the halides of Formula (V) above are obtainable, are prepared by the reaction of an appropriately substituted pyruvic acid or alkyl pyruvate with a hydrocarbon of the formula R<SP>2</SP>R<SP>3</SP>C = CH-C#CH in the form of its alkali-metal or Grignard derivative, followed by hydrolysis of the product. #-Ketoesters of the formula are obtained analogously to the #-ketoesters described above. Substituted lactic acid halides of the formula are obtained from the corresponding acids analogously to the substituted lactic acids described above. The preparation of certain acetylenic hydrocarbons is also described (see Division C5). |
| priorityDate | 1965-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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