COMPOUNDS COMPRISING POLYENE CHAIN STRUCTURE AND PROCESSES FOR PREPARING THE SAME

摘要

The present invention provides valuable intermediates which can be used in the synthesis of a compound having polyene chain structure, processes for preparing the same, and a process for preparing beta -carotene by using said intermediates. The process for preparing beta -carotene (Chemical Formula 3) or a compound having polyene chain structure, is characterized in that the polyene chain structure is formed by applying Ramberg-Bäcklund reaction to a diallylic sulfone obtained by the oxidation of diallylic sulfide. Further, the present invention provides retinyl sulfide which was synthesized by the coupling of diallylic sulfide with the corresponding Wittig salt.