SYNTHESIS AND STEREOCHEMISTRY OF RED PEPPER CAROTENOIDS

摘要: Abstract The synthesis of (3S,5R,3′S,5′R)-capsorubin, (3R,3′S,5′R)-capsanthin and (3S,5R)-cryptocapsin, the unique pigments red pepper fruit Capsicum annuum , starting from natural (+)-camphor, is reported. An alternative route to these interesting pigments, possessing five membered K-end groups, described utilizing (3R)-3-hydroxy-B-cyclocitral - an intermediate in technical (3R,3′R)-zeaxanthin as readily available material. Oxidation above-mentioned carotenoids (5R,5′R)-capso-rubone, (3R,5′R)-capsanthone (5R)-cryptocapsone respectively, performed using Oppenauer method. use food pigmenters discussed.