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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Publication of ES369230A1publicationCriticalpatent/ES369230A1/en
a method of preparing a new orange monoazo dye having the formula **(See formula)** wherein A is a benzene ring unsubstituted or substituted by a lower alcohol group, a lower alkoxy group or a halogen atom and one of X and Y is hydrogen and the other is -NHCOCh2CH2COOH or -NHCOCH = CHCOOH, which comprises making react a diazolated amine, which has the formula, ZCH2CH2SO2-A-NH2 (II) wherein A has the same meaning as set out above and Z is a hydroxy or -OSO3H group, with a derivative of α-naphthol, having the formula, **(See formula)** wherein X and Y have the same meaning as set forth above, and treating the resulting product, having a hydroxy group such as Z, in formula (II), with a sulfating agent. (Machine-translation by Google Translate, not legally binding)
ES369230A1968-07-081969-07-07A method for preparing a new orange monoazoic colorant. (Machine-translation by Google Translate, not legally binding)
ExpiredES369230A1
(en)