α-Nitro-α,β-Unsaturated Ketones: An Electrophilic Acyl Transfer Reagent in Catalytic Asymmetric Friedel–Crafts and Michael Reactions
作者:Chandrakanta Parida、Rajendra Maity、Subas Chandra Sahoo、Subhas Chandra Pan
DOI:10.1021/acs.orglett.9b02310
日期:2019.9.6
α-nitro-α,β-unsaturated ketones as efficient electrophilic acyl transfer reagents, and they were employed in Friedel-Crafts as well as in Michael reactions. The desired acyl transfer products of these reactions were obtained in high yields with high to excellent enantioselectivities with t-leucine-derived squaramide catalyst under mild reaction conditions. Few applications including a synthesis of the isoxazoline
在此,我们引入α-硝基-α,β-不饱和酮作为有效的亲电酰基转移试剂,并将其用于弗瑞德-克来福特(Friedel-Crafts)以及迈克尔反应中。在温和的反应条件下,用叔亮氨酸衍生的方酰胺催化剂以高收率和高至优异的对映选择性获得这些反应的所需酰基转移产物。很少有应用包括异恶唑啉基序的合成。