http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1525574-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8f4c2477bdea308bc9dec3feded37457 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C46-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C50-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C50-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C46-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C41-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-23 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-035 |
| filingDate | 1975-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1525574-A |
| titleOfInvention | Process for preparation of 1,4-benzohydroquinone derivatives |
| abstract | 1525574 Preparation of 1,4-benzohydroquinone derivatives EISAI CO Ltd 10 Oct 1975 [11 Oct 1974] 41596/75 Heading C2C A process for the preparation of a 2,3- dimethoxy-5-substituted-6-methyl-1,4-benzohydroquinone or a 1-monoester thereof of formula wherein R 1 is H or an acyl group and R 2 represents wherein n is 0 or an integer from 1 to 11 and A and B each are hydrogen or they may form a valence bond to form a double bond between the two carbon atoms to which they are attached, comprises reacting a 2,3-dimethoxy-6- methyl-1,4-benzoquinone or a monoester thereof of formula wherein R 1 is as defined above, with prenol or a derivative thereof having the formula or isoprenol or a derivative thereof of formula wherein X is a hydroxy group, a C 1-6 alkoxy group, an acyloxy group or a halogen atom and R 2 is as defined above, in the presence of an acidic catalyst for condensation which is adsorbed on an adsorbent. The examples describe the preparative of 2,3-dimethoxy-5-methyl-6- nonaprenyl-1,4-benzoquinone, 2,3-dimethoxy-5- methyl-6-decaprenyl-1,4-benzoquinone, 2,3-dimethoxy-5-methyl-6 - undecaprenyl - 1,4-benzoquinone, 2,3-dimethoxy-5-methyl-6-dodecaprenyl-1,4-benzoquinone and 2,3-dimethoxy-5- methyl-6-phytyl-1,4-benzoquinone. |
| priorityDate | 1974-10-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.