申请人:Rhone-Poulenc Sante
公开号:US04960904A1
公开(公告)日:1990-10-02
Cyclic sulphates of formula: ##STR1## are prepared by oxidation of a cyclic sulphite of formula: ##STR2## with a hypohalite of an alkali or alkaline-earth metal and a catalytic quantity of a ruthernium derivative (RuO.sub.2, RuCl.sub.3). In formulae (I) and (II), R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are identical or different and each represents hydrogen, halogen, alkyl, alkoxy, aryl, aryloxy or alkoxycarbonyl.
公式为:##STR1## 的环状硫酸酯是通过用碱金属或碱土金属的次卤酸盐和铑衍生物(RuO.sub.2,RuCl.sub.3)的催化量氧化公式为:##STR2## 的环状亚硫酸盐制备而成。在公式(I)和(II)中,R.sub.1,R.sub.2,R.sub.3,R.sub.4,R.sub.5和R.sub.6相同或不同,每个代表氢,卤素,烷基,烷氧基,芳基,芳氧基或烷氧羰基。