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Laboratorios Salvat SA
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Laboratorios Salvat SA
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Application filed by Laboratorios Salvat SAfiledCriticalLaboratorios Salvat SA
Priority to ES550551ApriorityCriticalpatent/ES8707735A3/es
Publication of ES550551A0publicationCriticalpatent/ES550551A0/es
Publication of ES8707735A3publicationCriticalpatent/ES8707735A3/es
PROCEDIMIENTO PARA LA OBTENCION DE UN DERIVADO DE LA 1,2-BENZOTIAZINA, CONCRETAMENTE 5-METIL-3-(2-PIRIDINIL)2H,5H-1,3-OXACINO5,6-C1,2BENZOTIAZINA -2,4(3H)-DIONA 6,6-DIOXIDO, DE FORMULA GENERAL (I). CONSISTE EN HACER REACCIONAR EL 2-METIL-4-HIDROXI-2H-1,2-BENZOTIAZINA-1,1-DIOXIDO-3-CARBOXILATO DE ETILO, DE FORMULA GENERAL (II), CON 2-PIRIDILISOCIANATO, PREPARADO IN SITU POR DESCOMPOSICION TERMICA DE 2-FENOXICARBONILAMINOPIRIDINA. LA REACCION SE LLEVA A CABO A FUSION O EN UN DISOLVENTE DE PUNTO DE EBULLICION ALTO, TALES COMO EL DIETILENGLICOLDIMETILETER, HIDROCARBUROS AROMATICOS COMO EL METILNAFTALERNO O LA TETRALINA O LA DECALINA.
ES550551A1985-12-301985-12-30Procedimiento de obtencion de un derivado de la benzotiazina
ExpiredES8707735A3
(es)
Processo para a preparacao de tetrakis(3-(3,5-ditero-butil-4-hidroxifenil)propioniloximetil)metano com estrutura amorfa e sua utilizacao como estabilizante