http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-371185-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B3-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B3-30 |
| filingDate | 1931-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1932-04-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-371185-A |
| titleOfInvention | Manufacture of vat-dyestuffs |
| abstract | Dibenzpyrenequinones are obtained by treating with a caustic alkali a 1.4- or 1.5-diaroylnaphthalene containing halogen in one of the o-positions of each of the aroyl residues or in the peri-positions of the naphthalene nucleus, or a substitution product thereof, in the presence or absence of a diluent. In examples the following substances are condensed by means of caustic potash in presence of quinoline or alcohol : 1.5-dichloro-4.8-dibenzoylnaphthalene (prepared by reacting benzoylchloride with 1.5-dichloronaphthalene in presence of aluminium chloride) to 3.4 : 8.9-dibenzpyrene-5.10-quinone; 4.8-di-(p - chlorbenzoyl) - 1.5 - dichlornaphthalene (prepared by reacting p-chlorbenzoyl chloride with 1.5 - dichlornaphthalene) 4.8-di-(o-, m- and p-toluoyl)-1.5-dichlornaphthalene to dimethyl-3.4 : 8.9 - dibenzpyrene - 5.10-quinones; 1.5 - dichloro - 2.6 - dimethyl - 4.8 - dibenzoylnaphthalene (prepared by reacting 2-6. dimethyl-1.5-dichlornaphthalene with benzoyl chloride in presence of aluminium chloride and in absence of a diluent) to 2.7-dimethyl-3.4 : 8.9-dibenzpyrene - 5.10 - quinone ; 1.5 - di - (o-bromobenzoyl)-naphthalene (prepared by reacting two mols. of o-bromobenzoyl chloride with naphthalene in the presence of aluminium chloride and in absence of a solvent); 1.4-dichloro - 5.8 - dibenzoylnaphthalene (prepared by chlorinating 1.4-dicyanonaphthalene, saponifying the resulting dichlordicyano derivative, and condensing the 5.8-dichloro-1.4-dicarboxynaphthalene with benzene) to 4.5 : 8.9-dibenzpyrene-3.10-quinone; 5.8-dichloro-1.4 - di - (p-chlorbenzoyl)-naphthalene (prepared in an analogous manner to above) to Bz 3. Bz 3<1>-dichloro- 4.5.8.9 - dibenzpyrene - 3.10 - quinone; 1.4-di-(2<1>-4<1>-pichlorbenzoyl)-naphthalene (prepared from 1.4-naphthalene dicarboxylic acid chloride and m p - dichlorbenzene); 1.4 - di - naphthoyl-5.8-dichlornaphthalene (prepared by condensing 5.8-dichloronaphthalene-1.4 - dicarboxylic acid chloride with 2 mols. of naphthalene); 5.8-dichloro-1.4-diacenaphthoylnaphthalene (prepared from 5.8-dichloronaphthalene-1.4-dicarboxylic acid chloride and acenaphthene by means of aluminium chloride). Specification 358,186 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) refers to the use of strongly alkaline condensing agents in general in the above condensation; this subject-matter does not appear in the Specification as accepted. |
| priorityDate | 1930-05-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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