Reaction of thiolsulfinates with trihaloacetic anhydrides. II
作者:Tsuyoshi Morishita、Naomichi Furukawa、Shigeru Oae
DOI:10.1016/s0040-4020(01)98953-7
日期:1981.1
various olefins in carbon tetrachloride afforded the corresponding β-trifluoro- or trichloroacetoxy sulfides in good yields. The β-trihaloacetoxy sulfides are considered to be resulted by the electrophilic addition of the sulfenyl trihaloacetates, formed as transient intermediates, to olefins. The addition takes place stereospecifically in trans manner and the regioselectivity for the addition with unsymmetrical
在四烯烃中存在各种烯烃的情况下,于-20℃用三氟-或三氯乙酸酐处理硫代亚磺酸盐,以良好的收率得到相应的β-三氟-或三氯乙酰氧基硫化物。认为β-三卤代乙酰氧基硫化物是由作为过渡中间体形成的亚磺酰基三卤代乙酸酯向烯烃的亲电子加成反应而产生的。加成反应以立体定向的方式进行,不对称烯烃的加成反应的区域选择性遵守了Markownikoff取向规则,除了3,3-二甲基-1-丁烯由于空间位阻起初产生了抗Markownikoff产物3之外,加合物3在加热时很容易转化为Markownikoff产物22。由于添加的是高度区域选择性和立体特异性的,