http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02055508-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_33c922e05f6133b7d72dbb849d77487d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_355e416f0f6b613816e0ab822aa37e24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f75ecbebd5fcae942ecc0b17e2125878 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D249-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D249-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 2002-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3fd8688b76868ab92fe028e76cf0768a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_171967c15867a1609b80079db8225c09 |
| publicationDate | 2002-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-02055508-A1 |
| titleOfInvention | Method for preparing 2-(2-hydroxyphenyl)-2h-benzotriazole |
| abstract | This invention provides a method for preparing 2-(2-hydroxyphenyl)-2H-benzotriazole of formula (I) below, consisting of steps of: a) performing a first reduction in which hydrazine hydrate is added to a compound of formula (II) below with or without a phase transition catalyst in the presence of solvents which include a nonpolar solvent, water, and an alkaline compound, thereby preparing a compound of formula (III) below; and b) performing a second reduction in which water is added to the compound of formula (III) prepared in step a), and then zinc powder and sulfuric acid are added thereto with or without the phase transition catalyst, wherein, X is halogen or hydrogen; R is hydrogen, C1-C12 alkyl, C5-C8 cycloalkyl, phenyl, or phenyl-C1-C4 alkyl; and R' is C1-C12 alkyl, C5-C8 cycloalkyl, phenyl, or phenyl-C1-C4 alkyl. |
| priorityDate | 2001-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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