| 摘要 |
The invention relates to a process for the preparation of alpha -hydroxycarboxylic acid amides of the formula: <CHEM> where R1 represents alkyl, alkaryl, aryl, alkenyl, heteroalkyl or heteroaryl, whether or not substituted, R2 represents hydrogen or methyl, or R1 and R2 together form cycloalkyl, by conversion of the corresponding cyanohydrins, and is characterized in that the conversion takes place in the presence of hydrogen peroxide and ammonia. By preference use is made of 2-6 moles hydrogen peroxide and 0.5-3 moles ammonia per mole cyanohydrin.
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