B. Cardillo et al., CYCLIZATION OF A CHIRAL N-CROTYL METHOXYCARBONYLACETAMIDE MEDIATED BYMN(III) - AN EASY ENTRY TO (R)-3-PYRROLIDINEACETIC ACID, Synlett, (11), 1995, pp. 1159
The N-crotyl methoxycarbonylacetamide 3, containing (S)-phenylethylami
ne as the chiral auxiliary, was cyclised with Mn(III), to give an easi
ly separable mixture of diastereomeric pyrrolidin-2-ones in 70:30 d.r.
The major isomer is a key intermediate to (R)-3-pyrrolidineacetic aci
d, inhibitor of GABA uptake in astrocytes.