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Novartis AG
Original Assignee
Ciba Geigy AG
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Publication date
Application filed by Ciba Geigy AGfiledCriticalCiba Geigy AG
Priority to ES477554ApriorityCriticalpatent/ES477554A3/es
Publication of ES477554A3publicationCriticalpatent/ES477554A3/es
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Procedimiento para la preparación de ácido etilen-bis-(alfa- imino-hidroxifenilacético) en donde una porción principal de éste es una forma isomérica orto, caracterizado porque comprende hacer reaccionar, a una temperatura entre alrededor de 45º y 80ºC, fenol con etilendiamina, ácido glioxílico y una base; estando presente dicho fenol, etilondiamina, ácido glioxílico y base en una relación molar de 3 a 20, 0,5 a 0,55, 0,95 a 1,25 y 0,75 a 1,25, respectivamente.
ES477554A1979-02-081979-02-08Procedimiento para la preparacion de acido etilen-bis-(alfa-imino-hidroxifenilacetico.
ExpiredES477554A3
(es)