Rolziracetam → 3-(5-Oxopyrrolidin-2-yl)propanoic acid

関与物質

反応手順

In accordance with the present invention an improved process for preparing dihydro-1H-pyrrolizine-3,5-(2H,6H)-dione comprises the steps of first catalytically hydrogenating a mono(lower alkyl) ester of 4-(hydroxyimino)heptanedioic acid in the presence of a tertiary lower alkyl amine to produce 5-oxo-2-pyrrolidinepropanoic acid, and thereafter heating the 5-oxo-2-pyrrolidinepropanoic acid in the presence of a cyclizing agent to form dihydro-1H-pyrrolizine-3,5-(2H,6H)-dione.

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