C₄₅‐ and C₅₀‐Carotinoide. 1. Mitteilung. Synthese von (R)‐ and (S)‐Lavandulol

C 45 ‐ and C 50 ‐Carotenoids, 1st Communication. Synthesis of ( R )‐ and ( S )‐Lavandulol Starting with methyl (3 R )‐3‐hydroxybutanoate (( R )‐7) and ethyl (3 S )‐3‐ hydroxybutanoate (( S )‐ 11 ), respectively, ( R )‐ and ( S )‐lavandulol (( R )‐ 1 and ( S )‐ 1 ) were synthesized with high optical purity. The synthesized key intermediates ( R )‐ 6 and ( S )‐ 6 are suitable compounds for the synthesis of optically active acyclic C 45 ‐ and C 50 ‐carotenoids.