Oxidative nitroalkylation of β-ketoamides and nitroalkanes, mediated by hypoiodide generated from tert-butyl hydrogen peroxide and a catalytic amount of guanidinium iodide, afforded the corresponding α-nitroalkyl-β-ketoamides in up to 97% yield.
作者:Claudia De Fusco、Sara Meninno、Consiglia Tedesco、Alessandra Lattanzi
DOI:10.1039/c2ob27283k
日期:——
The first enantioselective α-hydroxylation reaction of α-substituted β-ketoamides has been developed by using the commercially available hydroquinine/TBHP system. The tertiary alcohols are obtained in good to high yield and up to 83% ee, which can be improved by a single crystallization.
The first catalytic intermolecular oxidative cross‐coupling reaction between two different carbonyl compounds was achieved by using cumenehydroperoxide as an environmentally friendly, mild oxidant in the presence of a cyclic guanidinium hydroiodide derivative as a catalyst. Cross‐coupling reaction between variouβ ketoamides and oxindoles took place smoothly, and the corresponding 1,4‐dicarbonyl compounds
facile, economical and environmentally friendly strategy has been developed for the α-hydroxylation of β-ketoesters and β-keto amides with peroxides via radical cross-coupling reaction in water under open-air conditions. This protocol allows a convenient access to various α-hydroxy-β-keto esters and α-hydroxy-β-keto amides with up to 92% yield (34 examples). Moreover, the reaction was successfully