The alkylation of conjugated arylsulfonyl ylids, prepared from the corresponding allylic sulfones (2 or 8), and allylic halides bearing terminal carbonylgroups (3 or 4) leads to polyene sulfones which readily undergo spontaneous elimination of the corresponding aryl sulfinates. By this method two apocarotenoids (5 and 6) and torularhodin ethyl ester (9) have been prepared.
由相应的烯丙基砜(2或8)和带有末端羰基的烯丙基卤化物(3或4)制备的共轭芳基磺酰基基团的烷基化导致多烯砜,其易于自发消除相应的芳基亚
磺酸盐。通过这种方法,已经制备出两种类
胡萝卜素类
固醇(5和6)和类
固醇丁酸酯(9)。