Untersuchungen �ber eine Carbonyl-Olefinierung mit ?-metallierten Isocyaniden. Die Synthese von ?-Carotin und anderen Polyenen
摘要:
AbstractThe synthesis of various polyene isocyanides, e.g. β‐ionyl isocyanide and all‐trans‐retinyl isocyanide is reported. Their use in carbonyl‐olefination was investigated and compared with the Wittig reaction. β‐Carotene was obtained from all‐traws‐retinal and all‐trans‐retinyl isocyanide in good yield.