general and highly efficient method for the synthesis of dl-2,3-diamide-1,4-diones via autoxidative dehydrogenative homocoupling of N-acyl-2-aminoacetophenones mediated by t-BuOK. The transformation is mild, operationally simple, and environmentally friendly. Control experiments and stereochemical results suggest that the substrate undergoes autoxidation followed by a diastereoselective SN2 reactopm.
我们在此报告了一种通用且高效的方法,用于通过由t -BuOK 介导的N-酰基-2-氨基苯乙酮的自氧化脱氢同源偶联来合成dl -2,3-diamide-1,4- diones。改造温和、操作简单、环保。对照实验和立体化学结果表明,底物发生自氧化,然后发生非对映选择性 S N 2 反应。
Oxidative Cross-Coupling of α-Amino Ketones with Alcohols Enabled by I<sub>2</sub>-Catalyzed C–H Hydroxylation
oxidative cross-coupling of α-amino ketones with a wide range of alcohols is described. Using a combination of air and dimethyl sulfoxide (DMSO) as oxidants, the protocol allows an efficient synthesis of α-carbonyl N,O-acetals with high functional group tolerance and enables the late-stage introduction of α-amino ketones into biorelevant alcohols. Moreover, the present method can be used in the coupling of
This paper shows a novel oxidative functionalization of α-amino ketones to yield the corresponding α-ketoamides and α-acylimidates. The reaction proceeds via oxygen delivery from water/alcohols in conjunction with an electron acceptor and 4-dimethylaminopyridine (DMAP). Mechanistic study indicates that DMAP exhibits a dual function of nucleophilic catalysis and proton abstraction.