[ª--hydroxy-ª--(arylamino)acetyl]-aryl derivatives

摘要

The invention comprises compounds of the formula (wherein R is hydrogen, halogen (excluding iodine), hydroxy, alkoxy of at most 4 carbon atoms, nitro or acetylamino; A is oxygen, sulphur, sulphonyl, sulphinyl, methylene, ethylene or vinylene; X is hydrogen or a hydrocarbon radical of at most 12 carbon atoms; and Y is hydrogen, an alkali metal cation or alkyl of at most 4 carbon atoms) and their preparation by reacting a hydrate or alcoholate of a glyoxal of the formula with the appropriate amino-benzoic acid or salt or ester thereof in a solvent. If the solvent is an alcohol XOH the product contains the group X. Detailed examples are provided. Specification 912,011 is referred to.