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Novartis AG
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Ciba Geigy AG
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Publication of ES262761A1publicationCriticalpatent/ES262761A1/es
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur
(AREA)
Paper
(AREA)
Abstract
Procedimiento para la preparación de nuevos colorantes, caracterizado porque se condensa 2 moles de un halogenuro de un ácido 2,3-ftalcilpirrocolin-1-carboxílico de fórmula **FIGURA** en la que significan R1, R2, R3 y R4 átomos de hidrógeno o substituyentes no hidrosolubilizadores de los que cada vez dos substituyentes situados en posición orto uno con respecto al otro, pueden formar, juntamente con los átomos de carbono vecinos del esqueleto básico un anillo, significando. M, n, p y q números enteros por valor de a lo sumo 2, con un mol de una diamina, libre de grupos hidrosolubilizadores de fórmula H2N-arilo-X-arilo-NH2.
ES0262761A1959-11-261960-11-25Procedimiento para la preparacion de nuevos colorantes
ExpiredES262761A1
(es)