申请人:Bayer Aktiengesellschaft
公开号:US04929735A1
公开(公告)日:1990-05-29
A process for the preparation of an oxirane of the formula ##STR1## in which X is 4-chlorobenzyl, 4-phenylphenoxy or 1H-(1,2,4)-triazolyl, comprising reacting dimethyl sulphate with an excess of dimethyl sulphide thereby to form trimethylsulphonium methyl-sulphate of the formula (CH.sub.3).sub.3 S.sym.CH.sub.3 SO.sub.4 .crclbar., and without prior isolation reacting the trimethylsulphonium methyl-sulphate with a keytone of the formula ##STR2## in the presence of solid potassium hydroxide or sodium hydroxide in dimethyl sulphide at a temperature between 0.degree. C. and 50.degree. C.
一种制备式为##STR1##的环氧乙烷的方法,其中X为4-氯苄基、4-苯基苯氧基或1H-(1,2,4)-三唑基,包括将二甲基硫酸酯与过量的二甲基硫醚反应,从而形成式为(CH.sub.3).sub.3 S.sym.CH.sub.3 SO.sub.4 .crclbar.的三甲基磺酸甲酯,然后在没有先分离三甲基磺酸甲酯的情况下,在0℃至50℃的温度下,在二甲基硫醚中加入固体氢氧化钾或氢氧化钠,并与式为##STR2##的酮反应。