A synthesis of levetiracetam based on (S)-N-phenylpantolactam as a chiral auxiliary
The synthesis of levetiracetam and its enantiomer by deracemization of (±)-2-bromobutyric acid using either (S)- or (R)-N-phenylpantolactam as chiral auxiliaries, followed by SN2 substitution of the bromine atom by a 2-oxopyrrolidin-1-yl group and amidation of the carboxylic acid, is described.
Boschi, Francesca,Camps, Pelayo,Comes-Franchini, Mauro,Munoz-Torrero, Diego,Ricci, Alfredo,Sanchez, Laura
p. 3739 - 3745
(2007/10/03)
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