http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20050011020-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6298c4c8a9dc65a27deeadf713655d9f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-463 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-403 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-91 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-91 |
| filingDate | 2003-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6209df8dd0a519959de0a400c6f156cb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9a0c016efa82d5f8edde407868556520 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f8d3df350904be6d3192809a17f94a21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0c4740d87dad847249efdddd7267d93b |
| publicationDate | 2005-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20050011020-A |
| titleOfInvention | Process for the preparation of 3,4,5,7,8,9-hexahydro-2H-dibenzofuran-1-on, and 1-hydroxydibenzofuran and 4-hydroxycarbazole with 3,4,5,7,8,9-hexahydro-2H-dibenzofuran-1-on being a intermadiate |
| abstract | 3,4,5,7,8,9-hexahydro-2H-dibenzofuran-1-one, and 1-hydroxydibenzofuran and 4-hydroxycarbazole having the intermediate thereof A method for preparing (4-Hydroxycarbazole) is disclosed. 2-chlorocyclohexanone is reacted with 1,3-cyclohexanedione in a base and an organic solvent to form a carbon-carbon bond, and then the reaction is cyclized in the presence of an acid solution to give 3,4,5,7 , 8,9-hexahydro-2H-dibenzofuran-1-one is prepared, and 4-hydroxycarbazole is prepared through nitrogen substitution and dehydrogenation as an intermediate. On the other hand, 1-hydroxydibenzofuran can be obtained by dehydrogenating 3,4,5,7,8,9-hexahydro-2H-dibenzofuran-1-one. 3,4,5,7,8,9-hexahydro-2H-dibenzofuran-1-one according to the present invention, and 1-hydroxy dibenzofuran and 4- as intermediates thereof The process for preparing hydroxycarbazole increases the economics by using inexpensive starting materials, the reaction is stable under certain base and organic solvent conditions, and high yield of 3,4,5 due to the cyclization reaction occurring in the presence of an acid solution. , 7,8,9-hexahydro-2H-dibenzofuran-1-one is produced. In addition, these intermediates can be used to prepare 1-hydroxydibenzofuran and 4-hydroxycarbazole more stably and economically. |
| priorityDate | 2003-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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