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Bayer AG
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Bayer AG
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Publication date
Application filed by Bayer AGfiledCriticalBayer AG
Publication of ES239125A1publicationCriticalpatent/ES239125A1/en
Procedure for obtaining new dyes, characterized in that the compounds, which in their tautomeric form can be represented by the formula ** (See formula) ** wherein R1 and R2 are hydrogen, acyl, alkyl or aryl groups, in admixture with 2-amino-5-imino-pyrrolenins, which can be substituted in position 3 and 4 if necessary, are subjected to a heat treatment in presence of metal compounds which can be used for the preparation of phthalocyanines, which contain metal, and optionally in the presence of solvents and reducing agents. (Machine-translation by Google Translate, not legally binding)
ES0239125A1956-12-241957-12-14Procedure for the obtaining of new colors (Machine-translation by Google Translate, not legally binding)
ExpiredES239125A1
(en)
Procedure for the preparation of derivatives of 1,2 benzoisotiazolonas of antimicrobial effect. (Machine-translation by Google Translate, not legally binding)
Procedure for obtaining new derivatives of piperidil-2 phenylmethanols and their added salts (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of derivatives of 3,4-dihydroquinazoline dehydrogenable to the correspondents of quinazoline (Machine-translation by Google Translate, not legally binding)