Synthese von optisch aktiven, natuerlichen Carotinoiden und strukturell verwandten Naturprodukten. IX. Synthese von (3R)-Hydroxyechinenon, (3R,3'R)- und (3R,3'S)-Adonixanthin, (3R)-Adonirubin, deren optischen Antipoden und verwandten Verbindungen

Article abstract of DOI:10.1002/hlca.19810640754

The synthesis of racemic and optically active hydroxyechinenone (12-14), adonixanthin (16-19), adonirubin (22-24), meso-astaxanthin (26) and their corresponding diosphenols (15, 20, 21, 25, 27, 28, and 29) by Wittig reaction is reported, starting from suitable C15-phosphonium salts and C10-aldehydes.