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Bayer AG
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Bayer AG
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Publication of ES264962A1publicationCriticalpatent/ES264962A1/en
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur
(AREA)
Paper
(AREA)
Abstract
"Process for obtaining an optical brightener, composed of or containing practically colorless, fluorescent coumarin compounds of the general formula ** (See formula) ** where R is hydrogen or a lower alkyl radical and R1 is hydrogen or an alkyl, oxyalkyl, alkoxyalkyl, haloalkyl, cyanoalkyl, carboxyalkyl, sulfoalkyl, alkenyl, aralkyl, aryl, aryloacetoalkyl, an acyl or carbamyl group or a group ** (See formula) ** where R is hydrogen or a low alkyl radical and R2 and R3 independently of one another means hydrogen or an alkyl, cycloalkyl, alkenyl or aralkyl radical, optionally substituted, and R4, R5 and R6 are the same or different radicals, if appropriate substituted, alkyl, cycloalkyl, alkenyl or aralkyl, while X is by the bivalent moiety of an aliphatic hydrocarbon with preferably 1 to 4 carbon atoms and Y by an organic or inorganic acid moiety. (Machine-translation by Google Translate, not legally binding)
ES0264962A1960-02-221961-02-17Procedure for obtaining an optical blanker (Machine-translation by Google Translate, not legally binding)
ExpiredES264962A1
(en)
Procedure for the preparation of N-substituted piperidine derivatives and their use as stabilizers. (Machine-translation by Google Translate, not legally binding)