Iodine/DMSO promoted oxidation of benzylic Csp3–H bonds to diketones – A mechanistic investigation
作者:Janeeka Jayram、Bheki A. Xulu、Vineet Jeena
DOI:10.1016/j.tet.2019.130617
日期:2019.10
an α-methylene ketone. The electron paramagnetic resonance (EPR) spectrum centred at g = 2.0011 supports the involvement of iodine and benzylic radicals, as the α-iodinated compound 2-iodo-1,2-diphenylethanone was isolated as a key reactive intermediate. The oxidation reaction relies, primarily, on DMSO as a source of oxygen in benzil, proven by the reaction of benzyl phenyl ketone with diphenyl sulfoxide
本文介绍了对I 2 / DMSO介导的α-亚甲基酮的苄基C sp 3 -H氧化的机理的研究。中心为g = 2.0011的电子顺磁共振(EPR)光谱支持碘和苄基的参与,因为分离了α-碘化的化合物2-碘-1,2-二苯基乙酮作为关键的反应中间体。氧化反应主要依靠DMSO作为苯甲醚中的氧源,这是通过苄基苯基酮与二苯亚砜(DPSO)的反应证明的。