作者:Amar R. Mohite、Ravindra S. Phatake、Pooja Dubey、Mohamed Agbaria、Alexander I. Shames、N. Gabriel Lemcoff、Ofer Reany
DOI:10.1021/acs.joc.0c01431
日期:2020.10.16
conditions expedited by the presence of substoichiometric amounts of thiourea additives is presented. The amount of thiourea added dictates the pathway of the reaction, which may diverge from the desired halogenation reaction toward oxidation of the alcohol, in the absence of thiourea, or toward starting material recovery when excess thiourea is used. Both bromination and chlorination were highly efficient
提出了在亚化学计量的硫脲添加剂的存在下加速的在温和条件下醇的卤化。硫脲的添加量决定了反应的途径,该途径可能与所需的卤化反应不同,在没有硫脲的情况下朝着醇的氧化,或者在使用过量的硫脲时朝着原料的回收。溴化和氯化对于伯醇,仲醇,叔醇和苄醇都非常有效,并且可以耐受各种官能团。详细的电子顺磁共振(EPR)研究,同位素标记和其他对照实验表明,基于自由基的机理。反应是在环境条件下进行的,使用的试剂普遍存在且价格便宜,具有广泛的应用范围,并且可以实现高度原子经济,