http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107129432-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-287 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-31 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-287 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-157 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-83 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-31 |
| filingDate | 2017-06-06^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-11-03^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-03^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107129432-B |
| titleOfInvention | Synthesis method of ultraviolet absorbent 4,4' -dihexyl benzophenone |
| abstract | The invention discloses a method for synthesizing an ultraviolet absorbent 4,4' -dihexyl benzophenone, which comprises the following steps: taking p-hydroxybenzoic acid as an initial raw material, and protecting hydroxyl groups by acetylation; under the catalysis of zinc chloride and phosphorus oxychloride, the intermediate p-hydroxybenzoic acid phenyl ester is synthesized by reacting with phenol Fredel-Crafts; preparing an intermediate 4, 4-dihydroxy benzophenone by deacetylation protective group and Fries rearrangement; finally salifying with potassium carbonate, and synthesizing with 1-bromohexane under catalysis of tetrabutylammonium bromide through a Williamson reaction to obtain a 4,4' -bis (hexyloxy) benzophenone product; the invention has the following advantages: the reaction condition is mild, the temperature is low at normal pressure, and the quality control is stable; the conversion rate of the raw materials is high, and the side reaction is effectively inhibited; less three wastes, light pollution and benefit to the environment and the labor protection of the producer. |
| priorityDate | 2017-06-06^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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