The invention provides a preparation method of an oxiracetam impurity B. The preparation method of the oxiracetam impurity B comprises the following step: carrying out aminolysis reaction on 2oxo pyrrolidine caprolactone and glycine amide to obtain the oxiracetam impurity B. The preparation method of the oxiracetam impurity B is short in synthetic route time consumption, high in product yield and low in cost.
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Paragraph 0031-0061
(2021/05/01)
Pyrrolidone derivatives and memory enhancement use thereof
The invention relates to 4-hydroxy pyrrolidone derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 2-(4-hydroxy-2-oxo-1-pyrrolidineacetamido)acetamide.
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(2008/06/13)
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