We herein developed a stereoselective synthetic method for the preparation of multisubstituted
1,3-dienes via an allene–Claisen rearrangement. The Claisen rearrangement of anti-allenyl alcohols provided (1E,3Z)-1,3-dienes, which are essential components of bongkrekic acid, in high stereoselectivities.
To demonstrate the synthetic utility of the resulting 1,3-dienes, further functional
transformations and Diels–Alder reactions are described.
Key words
allenes - Claisen rearrangement - conjugated dienes - bongkrekic acid - stereoselectivity