http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-437382-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/C09B1-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B1-34 |
| filingDate | 1934-04-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1935-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-437382-A |
| titleOfInvention | Improvements in the manufacture and production of acid dyestuffs of the anthraquinone series |
| abstract | Anthraquinone dyes of the formula <FORM:0437382/IV/1> wherein R1 and R2 are the same or different aryl radicles, one x stands for an esterified carboxylic acid group, the other x stands for a hydrogen atom, and n for a whole number above zero, are prepared by (a) sulphonating bodies of the general formula <FORM:0437382/IV/2> wherein R1, R2, and x are as above, or (b) by reacting a primary arylamine with a compound of the formula <FORM:0437382/IV/3> wherein R stands for an aryl group containing one sulphonic acid group, x is as above, and y stands for halogen or a nitro group, or (c) by esterifying compounds of the formula <FORM:0437382/IV/4> wherein R1 and R2 are the same or different aryl radicles at least one of which contains a sulphonic acid group, and one x stands for the carboxylic acid group and the other for hydrogen. In examples: (1) 1.4-dichloranthraquinone-2-carboxylic acid methyl ester (prepared by diazotizing 1-amino-2-methyl-4-chloranthraquinone, treating the diazo compound with cuprous chloride, oxidizing the product with pyrolusite in sulphuric acid and esterifying) is condensed with p-toluidine, aniline, p-cyclohexylaniline (two mols. in each case) followed by sulphonation (dyes wool green shades); (2) 1.4-dichloranthraquinone-2-carboxylic acid methyl ester is condensed with 1 mol. of aniline and then with 1 mol. of p-toluidine and finally sulphonated (green shades); aniline and p-toluidine may be condensed in reverse order with subsequent sulphonation to give a similar dyestuff and the corresponding ethyl ester of the starting material may be used; (3) 1.4-dichloranthraquinone-2-carboxylic acid ethyl ester is condensed with p-toluidine (1 mol.), the product sulphonated and condensed with a further mol. of p-toluidine (yellowish-green shades); this starting material is also condensed with 1 mol. of aniline-m-sulphonic acid and then with 1 mol. of p-toluidine (yellowish-green); (4) 1.4-dichloranthraquinone-6-carboxylic acid methyl ester (prepared by treating the acid with methanol in sulphuric acid) is condensed with 2 mols. of p-toluidine and p-cyclohexylaniline followed by sulphonation in each case (green shades); the methyl ester may be replaced by the ethyl ester when using p-toluidine as reactant; (5) 1.4-di-p-toluidinoanthraquinone - 6 - carboxylic acid is sulphonated and methylated. |
| priorityDate | 1934-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.