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Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
SE DESCRIBE UN METODO PARA PREPARAR 2,3DICLOROPIRIDINA, DONDE 3AMINO2CLOROPIRIDINA SE PONE EN CONTACTO CON UN NITRITO DE METAL ALCALINO EN PRESENCIA DE UN ACIDO CLORHIDRICO ACUOSO PARA FORMAR UNA SAL DE DIAZONIO, Y LA SAL DE DIAZONIO DESPUES SE DESCOMPONE EN PRESENCIA DE UN CATALIZADOR DE COBRE, DONDE POR LO MENOS APROXIMADAMENTE 50% DEL COBRE ESTA EN EL ESTADO DE DE OXIDACION DEL COBRE (II).A METHOD IS DESCRIBED TO PREPARE 2,3DICLOROPIRIDINE, WHERE 3AMINO2CHLOROPIRIDINE IS CONTACTED WITH AN ALKALINE METAL NITRITE IN THE PRESENCE OF AN ACOUSED CHLORIDE HYDROGEN TO FORM A DIAZONIO SALT, AND THE DIAZONIO DEPRESSION DEPOSITION SALE COPPER, WHERE AT LEAST APPROXIMATELY 50% OF COPPER IS IN THE COPPER OXIDATION STATE (II).
GT200500193A2005-07-142005-07-14
PROCESS FOR THE MANUFACTURE OF 2,3-DICLOROPIRIDINE
GT200500193A
(en)
Tripyridinium compounds used as additives in aqueous alkaline baths, devoid of cyanide, for the deposition of electroplated zinc and zinc alloy coatings