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Evonik Operations GmbH
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Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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Application filed by Degussa GmbH, Deutsche Gold und Silber ScheideanstaltfiledCriticalDegussa GmbH
Publication of ES278670A1publicationCriticalpatent/ES278670A1/en
Nitrogen- Or Sulfur-Containing Heterocyclic Ring Compounds With Rings Of Six Or More Members
(AREA)
Abstract
Process for the preparation of 4-aza-phenothiazine of the general formula ** (See formula) ** in which a hydrogen atom of the benzene ring can be substituted by a chlorine atom, Alo represents a straight or branched alkyl radical with 2 to 4 carbon atoms, and R means a hydrogen atom or a lower alkyl radical, characterized by that, in an inert solvent medium and, preferably, in the presence of a condensation medium separating hydrogen halide, a 4-aza-phenothiazine, optionally substituted in the benzene or pyridine ring, of the formula is heated ** (See formula) ** with a compound of the general formula ** (See formula) ** wherein R 'means a lower alkyl radical, it is then saponified, optionally, according to a known process and, if necessary, the base formed is converted into its salt or into a quaternary ammonium compound. (Machine-translation by Google Translate, not legally binding)
ES0278670A1961-07-121962-06-26A procedure for the manufacture of 4-aza-phenotyazines (Machine-translation by Google Translate, not legally binding)
ExpiredES278670A1
(en)
Procedure for the preparation of compounds of 2- (2º-hydroxy-3º-propenyl-phenyl) -benzotriazol (Machine-translation by Google Translate, not legally binding)