ORGANOMANGANESE (II) REAGENTS XVIII: COPPER-CATALYZED 1,4-ADDITION OF ORGANOMANGANESE CHLORIDE COMPOUNDS TO CONJUGATED ETHYLENIC ALDEHYDES.

Article abstract of DOI:10.1016/S0040-4039(00)70698-8

Organomanganese chlorides react with β-mono or β,β-bisubstituted α,β-ethylenic aldehydes in the presence of a catalytic amount of copper chloride to give good yields of 1,4-addition products in THF at -30 deg C.