M. Johannsen et al., THE FIRST HIGHLY ENANTIOSELECTIVE CATALYTIC HETERO-DIELS-ALDER REACTION OF KETONES, Chemical communications, (22), 1997, pp. 2169-2170
The first highly enantioselective catalytic hetero-Diels-Alder reactio
n of various aliphatic and aromatic ketones with an activated conjugat
ed diene catalysed by chiral copper(II) complexes with enantiomeric ex
cesses up to 99% is presented.