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Novartis AG
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JR Geigy AG
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Publication of ES225589A1publicationCriticalpatent/ES225589A1/es
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
Procedimiento para la preparación de 1 2-diaril-3 5-dioxopirazolidinas substituidas en posición 4 caracterizado porque se hace reaccionar un derivado funcional apto para reaccionar de un ácido carboxílico de fórmula general **(ver fórmula)** en la cual significa R-CO- el radical de un ácido carboxilico alifático cicloalifático aralifático o aromático con un malonilhidrazobenceno de fórmula general **(ver fórmula)** en la cual significan Ar1 y Ar2 radicales fenilo que pueden estar substituidos del mismo o de distinto modo eventualmente en presencia de un medio de condensación.
ES0225589A1954-12-161955-12-15UN PROCEDIMIENTO PARA LA PREPARACIoN DE 1,2-DIARIL-3,5-DIOXO-PIRAZOLIDINAS SUSTITUIDAS EN POSICION 4
ExpiredES225589A1
(es)