disulphides. The reaction can either be initiated by indirect electrochemical oxidation of diphenyldisulphide using bromide as redox catalyst or preferably by direct anodic oxidation of bis(4-methoxyphenyl) disulphide. 5- and 6-membered thioaryl substituted ethers and lactones thus may be generated starting preferably from mono or disubatituted alkenols and alkenoic acids. The reaction occurs as a trans-addition
烯醇和链烯酸的分子内磺基醚化或磺基内酯化可通过添加由二
硫化物开始的电
化学生成的亚磺酰基阳离子来引发。该反应可以通过使用
溴化物作为氧化还原催化剂的二
苯基二硫化物的间接电
化学氧化来引发,或者优选通过双(4-
甲氧基苯基)二
硫化物的直接阳极氧化来引发。因此,优选从单或二取代的链烯醇和链烯酸开始,生成5-和6-元
硫代芳基取代的醚和内酯。该反应作为双键的反式加成而发生,而对于环内双键,新环被顺式退火。