Conversion of bis(o-nitrophenyl)disulfides to heterocycles containing sulfur and nitrogen by the action of samarium diiodide
作者:Weihui Zhong、Xiaoyuan Chen、Yongmin Zhang
DOI:10.1002/hc.1025
日期:——
Treatment of bis(o-nitrophenyl)disulfides 1 with SmI2 led to simultaneous reduction of nitro groups and reductive cleavage of S–S bonds as well as the formation of the active intermediates 2. The intermediates 2 reacted smoothly with aldehydes or ketones, acid chlorides or anhydrides, α-bromoketones, and α,β-unsaturated ketones at room temperature to afford the desired benzothiazolines 3, benzothiazoles
用 SmI2 处理双(邻硝基苯基)二硫化物 1 导致硝基的同时还原和 S-S 键的还原断裂以及活性中间体 2 的形成。中间体 2 与醛或酮、酰氯顺利反应或酸酐、α-溴酮和 α,β-不饱和酮在室温下得到所需的苯并噻唑啉 3、苯并噻唑 4、2H-1,4-苯并噻嗪 5 和 2,3-二氢-1,5-苯并噻嗪 6,分别在温和和中性条件下以中等至高产量获得。© 2001 John Wiley & Sons, Inc. 杂原子化学 12:156–160, 2001