http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-486668-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_88351361afebc56098942c3c3e20831e http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a60c34801d871edbf34a03278584cf28 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2603-50 |
| filingDate | 1936-12-08^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-06-08^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-486668-A |
| titleOfInvention | Manufacture of pyrenecarboxylic acids and alkylarylcarbamylpyrenes |
| abstract | Pyrene is condensed with an alkylarylcarbamyl halide in presence of anhydrous aluminium chloride to give an alkylarylcarbamylpyrene, which may be hydrolyzed to give a pyrene-carboxylic acid. Alkylarylcarbamyl halides specified are ethylphenylcarbamyl chloride or bromide, methylphenylcarbamyl chloride, propylphenylcarbamyl chloride, and methyltolylcarbamyl chloride. Solvents for the Friedel-Crafts condensation are chlorbenzene and o-dichlorbenzene, and the hydrolysis may be effected using concentrated sulphuric acid, preferably of 60 per cent strength. In examples, pyrene is heated in chlorbenzene in presence of aluminium chloride with 1 mol. of ethylphenylcarbamyl chloride to give 3-ethylphenylcarbamyl-pyrene, which is then boiled with 65 per cent sulphuric acid to give pyrene-3-carboxylic acid, or with two mols. of ethylphenylcarbamyl chloride to give a bis-(ethylphenylcarbamyl) pyrene, which is hydrolyzed to a pyrene-dicarboxylic acid. Also, pyrene is melted with ethylphenylcarbamyl chloride, and aluminium and sodium chlorides to give the same bis-(ethylphenylcarbamyl)-pyrene and pyrene dicarboxylic acid. Specification 456,070 is referred to. |
| priorityDate | 1936-12-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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