An alternatively metal-free synthesis of 1,3,5-triazines or 1,2,4-thiadiazoles from benzyl chlorides and benzylamines mediated by elemental sulfur
作者:Yurong Zhang、Yafei Liu、Jun Zhang、Ren Gu、Shiqing Han
DOI:10.1016/j.tetlet.2019.151289
日期:2019.12
An elemental sulfur mediated reaction of benzyl chlorides with benzylamines is developed, which allows the practical synthesis of valuable 1,3,5-triazines. This protocol that is metal free, ligand free, and uses inexpensive elemental sulfur as oxidant or raw material displays mild reaction conditions, a broad substrate scope and moderate to good yields. Moreover, the modified sulfur-mediated reaction
开发了一种由元素硫介导的苄基氯与苄基胺的反应,该反应可以实际合成有价值的1,3,5-三嗪。该方案不含金属,不含配体,并使用廉价的元素硫作为氧化剂或原料,显示出温和的反应条件,广泛的底物范围和中等至良好的产率。而且,通过简单地将硫粉的化学计量从0.75当量切换为5当量,修饰的硫介导的反应系统也可以用于合成1,2,4-噻二唑。