A direct catalytic asymmetric addition of allyl cyanide to ketones with a bimetallic catalytic system comprising (R,R)-Ph-BPE/[Cu(CH3CN) 4]ClO4/LiOAr is described. Exclusive γ-addition of allyl cyanide was observed, affording optically enriched tertiary alcohols bearing Z-configured α,ß-unsaturated nitriles. The reaction proceeded under proton-transfer conditions, utilizing soft Lewis acid/hard Brønsted base bifunctional catalysis. The applicability of the reaction to aromatic, heteroaromatic, and aliphatic ketones demonstrates its wide substrate generality.
|Number of pages||3|
|Journal||Journal of the American Chemical Society|
|Publication status||Published - Mar 11 2009|
All Science Journal Classification (ASJC) codes
- Colloid and Surface Chemistry