A convenient approach to diastereomerically pure 1,3,4-trisubstituted pyrrolidin-2-ones by intramolecular cyclisation of N-(2-alken-1-yl)amides mediated by Mn(III). An entry to both (R)- and (S)-3-pyrrolidineacetic acid

Article abstract of DOI:10.1016/0040-4020(95)00939-6

The oxidative cyclisation of a series of either (S)-N-(2-alken-1-yl)-N-(1-phenyleth-1-yl)-acetoacetamides 5a-d and methoxycarbonylacetamides 6a-b, performed by using Mn(OAc)₃ · 2H₂O and Cu(OAc)₂ · H₂O in acetic