Use of Hypervalent Iodine Reagents in Visible Light-Promoted α‑Ketoacylations of Sulfoximines with Aryl Alkynes
journal contributionposted on 29.10.2020, 19:17 by Chenyang Wang, Ding Ma, Yongliang Tu, Carsten Bolm
In visible light, sulfoximidoyl-containing hypervalent iodine reagents react with aryl alkynes to give N-α-ketoacylated sulfoximines in good to high yields. The process is metal- and base-free, providing the diketonic products without the use of highly oxygenated reagents such as peroxides. Results from mechanistic investigations suggest the intermediacy of radicals and reveal the importance of molecular oxygen.