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Martínez-Pardo, Pablo; Blay Llinares, Gonzalo; Muñoz, M. Carmen; Pedro, José Ramón; Sanz Marco, Amparo; Vila Descals, Carlos | |||
Aquest document és un/a article, creat/da en: 2018 | |||
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A multicatalytic approach that combines a bifunctional Brønsted base-squaramide organocatalyst and Ag+ as Lewis acid has been applied in the reaction of unactivated ketones with tert-butyl isocyanoacetate to give chiral oxazolines bearing a quaternary stereocenter. The formal [3+2] cycloaddition provided high yields of the corresponding cis-oxazolines with good diastereoselectivity and excellent enantioselectivity, being applied to aryl-alkyl and alkyl-alkyl ketones. | |||
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