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Bayer Pharma AG
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Schering AG
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Publication date
Application filed by Schering AGfiledCriticalSchering AG
Publication of ES158730A2publicationCriticalpatent/ES158730A2/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Mejoras introducidas en el objeto de la patente principal número 150966 caracterizadas porque en lugar de la 2-aminopirimidina se emplea su combinación bencilidénica para hacerla reaccionar con los correspondientes ácidos sulfónicos o sus derivados reaccionables en especial los halogenuros de dicho ácido y en caso necesario se hidroliza el producto de la reacción y el grupo amino se restablece en posición para respecto al grupo sulfonamido.Improvements introduced in the object of main patent number 150966 characterized in that instead of 2-aminopyrimidine, its benzylidene combination is used to make it react with the corresponding sulfonic acids or their reactive derivatives, especially the halides of said acid and if necessary it is hydrolyzed the reaction product and the amino group are reestablished in the para position to the sulfonamido group.
ES0158730A1941-09-291942-09-26
IMPROVEMENTS MADE IN THE OBJECT OF THE MAIN PATENT
ExpiredES158730A2
(en)
Analogous process for the preparation of N- [4- (β- <2-methoxy-5-chlorobenzamido> -ethyl) -benzenesulfonyl] -N'-cyclopentylurea or salts thereof with bases.
Process for the preparation of derivatives of 4,4'-bis- (1,3,5-triazyl- (6) -amino) -diaminostilben-disulfonic acid (2,2 ') or salts of these acids.