C45-and C50-Carotenoids. Synthesis of an Optically Active Cyclic C20-Building Block and of (2R,2'S)-3',4'-Didehydro-1',2'-dihydro-2-(4-hydroxy-3-methylbut-2-enyl)-2'-(3-methylbut-2-enyl)-β,Ψ-caroten-1'-ol (=C.p. 473)

Article abstract of DOI:10.1002/hlca.19860690622

The synthesis of the optically active C20-building block (R)-16 and of the optically active C50-carotenoid C.p. 473 (1) starting from (-)-β-pinene is reported.