ChemInform Abstract: Selective 1,2‐Addition of Organo‐Cerium(III) Reagents to α,β‐Unsaturated Carbonyl Compounds.

Abstract A suspension of cerium trichloride (I) is treated with the organo‐lithium compounds (II), forming the organo‐cerium agents (III) which react with the α,β‐unsaturated carbonyl compounds (IV) to give predominantly the allylic alcohols (V), together with the saturated compounds (VI).