Memory of chirality effects in aldol cyclisations of 1-(3-oxobutyryl) derivatives of L-4-oxaproline and L-proline isopropyl esters

摘要

Stereoretentive C-C bond formations are features of the aldol cyclisations of the 1-(3-oxobutyryl) derivatives of L-4-oxaproline and L-proline isopropyl esters, consisten with the involvement of axially chiral enolate intermediates.