4-Alkoxy-3-pyrrolin-2-on-1-ylacetamides are valuable intermediates in the synthesis of 4-hydroxypyrolidin-2-on-1-ylacetamide, which has a cerebral effect. The intermediates are used for preparing the active substance.
4-Alkoxy-3-pyrrolin-2-on-1-yl-acetic-acid amides, their manufacture and use.