sustainable advanced synthetic methods based on redox cyclization. Elemental sulfur is shown to promote the efficient synthesis of 2-substituted benzothiazoles from 2,2′-dinitrodiphenyl disulfides and benzylamines via redox cyclization in the absence of transition-metal catalysts and solvents. The 2-substituted benzothiazoles are obtained in good to excellent yields. This synthetic methodology is highly atom-economical
这项研究旨在开发基于氧化还原环化的绿色和可持续的先进合成方法。元素
硫显示出在不存在过渡
金属催化剂和溶剂的情况下,通过氧化还原环化作用,可以由2,2'-二硝基二
苯基二硫化物和苄基胺促进2-取代的
苯并噻唑的高效合成。以良好至优异的产率获得2-取代的
苯并噻唑。该合成方法是高度原子经济的,不需要任何外部氧化剂和/或还原剂。