A process for preparing purified alkali metal salts of ((1-oxyalkanoyl) amino) alkanoate 4-sulfophenyl without isolation of intermediates.

摘要

THIS invention relates to a method FIVE STEPS TO PREPARE A alkali metal salt purified 4sulfophenyl [[] (() 1-oxyalkanoyl ()) AMINO []] alkanoate in a reaction vessel without isolation of Intermediaries. THE FIRST STEP governs reacting an alkali metal salt ACID 4HIDROXIBENCENOSULFONICO AN ANHYDRIDE CARBOXYLIC C {SUB, 2} AC {SUB, 4} IN A SOLVENT TO FORM A alkali metal salt of 4-ACILOXIBENCENOSULFONICO AND carboxylic acid C {SUB, SUB {2} AC, 4}. The second step includes adding an acid [[] (() -1-oxyalkanoyl ()) AMINO []] alkanoic and a transesterification catalyst to the reaction product of step (a) and heating at a temperature and pressure sufficient to maintain A refluxing solvent and eliminate CARBOXYLIC ACID SUB {C 2} {SUB AC, 4} of the reaction vessel to form a mixture A containing reaction alkali metal salt of 4-sulfophenyl [[] (() 1- oxyalkanoyl ()) AMINO []] alkanoate. THE THIRD STEP OF COVERING THE ELIMINATION Solubility reaction mixture formed in step (B). STEP FOUR COVERING THE MIXED ALKALI METAL SALT PRODUCT OF 4-sulfophenyl - [[] (() 1OXIALCANOILO ()) AMINO []] alkanoate STEP (C) ACETIC ACID. STEP FIVE COVERING THE SEPARATION OF ACETIC ACID PRODUCT. THE alkali metal salt purified PRODUCT 4SULFOFENIL - [[] (() -1-oxyalkanoyl ()) AMINO []] alkanoate is useful as a bleach activator in detergents.