http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5645474-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_47ec6de4e21e1b33a1f9946bbbcbd341 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D473-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D473-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D473-04 |
| filingDate | 1979-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ae76050861fe80fd044dd9eaba5eab3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2eabf85c9da11c8c35413d2ea553ce2d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1cfd619ec31c831584133761de718b4a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7877e6e3d8bfa354f3ff9faee49e92bb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_11687989a6fa03c7b15875598dbc813f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_995dcdb7e0419c49a457c6afd6d20b63 |
| publicationDate | 1981-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5645474-A |
| titleOfInvention | Production of 5-oxohexyl-dialkylxanthine |
| abstract | PURPOSE: In the presence or absence of a mercuric salt, 5'-hexynyl-dialkyl-xanthine is treated with water under heating in the presence of an acid to produce the title compound with high purity inexpensively in high yield. n CONSTITUTION: A compound of formula I (when R 1 is 5-hexynyl, R 2 is alkyl; when R 1 is alkyl of 12 or more carbon atoms, R 2 is 5-hexynyl) is heated together with water in the presence of an acid at 60W100°C in the presence or absence of a mercuric, silver, cadmium or zinc salt for 1W20hr to produce a compound of formula II (when R 3 is 5-oxohexyl, R 4 is alkyl; when R 3 is alkyl of 2 or more carbon atoms, R 4 is 5-oxohexyl). When a strong acid such as sulfuric, hydrochloric, or trichloroacetic acid is used as the acid, the objective compound is given in a short time in high yield. The compound of formula I is novel and obtained by the reaction of 1,3-dialkylxanthine and 5-hexynyl halide. n COPYRIGHT: (C)1981,JPO&Japio |
| priorityDate | 1979-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.