Selective Aerobic Oxidation of Methylarenes to Benzaldehydes Catalyzed by <i>N</i>
-Hydroxyphthalimide and Cobalt(II) Acetate in Hexafluoropropan-2-ol
作者:Eden Gaster、Sebastian Kozuch、Doron Pappo
DOI:10.1002/anie.201702511
日期:2017.5.15
Efficient and highly selective catalytic conditions for the aerobic autoxidation of methylarenes to benzaldehydes, based on N‐hydroxyphthalimide (NHPI) and cobalt(II) acetate in 1,1,1,3,3,3‐hexafluoropropan‐2‐ol (HFIP), were developed. The sustainable conditions enable a multigram scale preparation of benzaldehyde derivatives in high efficiency and with excellent chemoselectivity (up to 99 % conversion
Selective C(sp3)–H bond aerobic oxidation enabled by a π-conjugated small molecule-oxygen charge transfer state
作者:Panyi Huang、Yan Xu、Haijing Song、Jiayin Wang、Jiayang Wang、Jianjun Li、Bin Sun、Can Jin
DOI:10.1039/d4gc02010c
日期:——
Due to the high oxidation potential of arenes and alkenes, previous methods of benzylic and allylic C–H oxidation necessitated the use of strong oxidizingagents, metal catalysts, or free radical initiators (such as photocatalysts or hydrogen atom transfer reagents) to be effective. Herein, we employ oxygen to generate a triple-spin charge transfer state with π-conjugated compounds effectively accessing