General Route for Preparing β-Nitrocarbonyl Compounds Using Copper Thermal Redox Catalysis
作者:Amber A. S. Gietter、Peter G. Gildner、Andrew P. Cinderella、Donald A. Watson
DOI:10.1021/ol5014153
日期:2014.6.6
Using a simple copper catalyst, the alkylation of nitroalkanes with α-bromocarbonyls is now possible. This method provides a general, functional group tolerant route to β-nitrocarbonyl compounds, including nitro amides, esters, ketones, and aldehydes. The highly sterically dense, functional group rich products from these reactions can be readily elaborated into a range of complex nitrogen-containing
and aldehyde) in the C5 position with excellent regioselectivity (C5/others >20:1). Moreover, this protocol is also suitable for polycyclic aromatichydrocarbons and the more remote C8 position. Preliminary mechanistic studies show that the tertiary phosphine group plays two essential roles in the reaction: first, it assists the introduction of Ru–C bond at the C8 position; second, due to the induction
Iron-catalyzed intramolecular C-H amination of aliphatic azides has recently emerged as a powerful tool for the preparation of nitrogen heterocycles. This paper reports that α-azidyl amides can be converted in high efficacy to imidazolinone compounds via intramolecular C(sp3)-H amination by the action of a simple catalytic system composed of FeCl2 and a β-diketiminate ligand. The reactions provide