acid (pH <4.5) and base (pH >11.5) catalysed acyl transfer to the solvent, giving the amides (12). But at intermediate pH (6–11) rearrangement to the N-acyl form (11)(the Mumm rearrangement) alone occurs. The specific rate of this O → N acyl group migration is pH independent and shows a low solvent effect (m 0.175). Substituents attached to carbon or nitrogen have the same effect (ρ–0.84). When the migrating
SUZUKI TOSHINOBU; MITSUHASHI KEIRYO, NIXON KAGAKU KAJSI, NIRRON KAGAKU KAISNI, J. CHEM. SOS. JAR., CHEM. AND I+
作者:SUZUKI TOSHINOBU、 MITSUHASHI KEIRYO
DOI:——
日期:——
Mumm, Chemische Berichte, 1910, vol. 43, p. 892
作者:Mumm
DOI:——
日期:——
Metal-free photoredox-catalyzed direct α-oxygenation of <i>N</i>,<i>N</i>-dibenzylanilines to imides under visible light
作者:Nalladhambi Neerathilingam、Ramasamy Anandhan
DOI:10.1039/d2ra00585a
日期:——
An efficient synthesis of imides using metal-free photoredox-catalyzed direct α-oxygenation of N,N′-disubstituted anilines in the presence of 9-mesityl-10-methylacridinium [Acr+-Mes]BF4 as a photoredox catalyst and molecular oxygen as a green oxidant under visible light was developed. This photochemical approach offered operational simplicity, high atom economy with a low E-factor, and functional group