Ceric ammonium nitrate (CAN) as a green and highly efficient promoter for the 1,4-addition of thiols and benzeneselenol to α,β-unsaturated ketones
作者:Cheng-Ming Chu、Shijay Gao、M.N.V. Sastry、Chun-Wei Kuo、Chaowei Lu、Ju-Tsung Liu、Ching-Fa Yao
DOI:10.1016/j.tet.2006.12.018
日期:2007.2
efficient process for the 1,4-addition of thiols and benzeneselenols to various α,β-unsaturated ketones using a catalytic amount of CAN with excellent product yields is described. This inexpensive, nontoxic, and readily available catalytic ceric(IV) ammonium nitrate system efficiently catalyzes conjugate addition reactions between thiol derivatives and various α,β-unsaturated ketones under solvent-free conditions
描述了一种温和而有效的方法,该方法使用催化量的CAN以优异的产品收率将硫醇和苯硒酚的1,4-加成成各种α,β-不饱和酮。这种廉价,无毒且容易获得的催化硝酸铈(IV)铵体系可在无溶剂条件下有效催化硫醇衍生物与各种α,β-不饱和酮之间的共轭加成反应。提出了一种可能的机制,即CAN在自由基链加成反应中作为促进剂以及在共轭加成过程中的催化作用。