Intermediates useful in the synthesis of a compound having polyene chain structure, processes for preparing the same, and a process for preparing &bgr;-carotene utilizing the same are disclosed. Also disclosed is a novel compound, retinyl sulfide, which was synthesized by the coupling of a diallylic sulfide of the present invention with the corresponding Wittig salt.
本发明公开了用于合成具有多烯链结构的化合物的中间体、制备这种化合物的工艺以及利用这种化合物制备&bgr;-
胡萝卜素的工艺。还公开了一种新型化合物视黄基
硫醚,它是通过本发明的
二烯丙基硫醚与相应的维蒂希盐偶联合成的。