Metal‐Free Catalytic Boration at the β‐Position of α,β‐Unsaturated Compounds: A Challenging Asymmetric Induction

Enantiomerically enriched secondary organoboronates containing β-carbonyl functional groups have been prepared using an unprecedented organocatalytic system (see scheme). The use of chiral tertiary phosphorus compounds induced ee values of up to 95 % in the absence of transition metals.