STEREOSPECIFIC [4-MORPHOLINO-1,3-BUTADIENES AND ALPHA,BETA-UNSATURATED EXOCYCLIC CHROMIUM CARBENE COMPLEXES - PREPARATION OF ENANTIOMERICALLY PURE SPIRO COMPOUNDS(2]REACTION BETWEEN 2)
J. Barluenga et al., STEREOSPECIFIC [4-MORPHOLINO-1,3-BUTADIENES AND ALPHA,BETA-UNSATURATED EXOCYCLIC CHROMIUM CARBENE COMPLEXES - PREPARATION OF ENANTIOMERICALLY PURE SPIRO COMPOUNDS(2]REACTION BETWEEN 2), Synlett, (9), 1997, pp. 1040-1042
A stereospecific exoselective [4+2] reaction between alpha,beta unsatu
rated exocyclic chromium carbene complexes and 2-amino-1,3 butadienes
is described. Its application employing homochiral carbene complexes g
ives rise to the optically pure spiro-lactones.