The reactions of methanedisulfonyl chloride (II) with ketene diethylacetal (III), 1 -morpholinocyclohexene (IV), and 1-piperidinopropene (V) in the presence of triethylamine were studied. The products obtained were the double cycloadduct, spiro bithietane tetroxide (VI), and the substitution products (X and XV). These findings suggest that triethylamine dehydrochlorinates methanedisulfonyl chloride to produce disulfene. However, as yet we cannot say whether the formation of disulfene is the one-step dechydrochlorination mechanism (ClSO2CH2SO2Cl → SO2=C=OS2) or the two-step one (ClSO2CH2SO2Cl → ClSO2CH=SO2 → SO2=C-SO2).
研究了
甲烷二磺酰氯(II)与酮烯二
乙缩醛(III)、1-吗啉
环己烯(IV)和 1-
哌啶丙烯(V)在
三乙胺存在下的反应。得到的产物是双环加合物、螺双
乙烷四氧化物(VI)和取代产物(X 和 XV)。这些发现表明,
三乙胺可使
甲烷二磺酰氯脱氢生成二亚砜。不过,我们还不能确定二
硫烯的形成是一步脱氢
氯化机理(ClSO2CH2SO2Cl → SO2=C=OS2)还是两步机理(ClSO2CH2SO2Cl → ClSO2CH=SO2 → SO2=C-SO2)。