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Abstract Cooperative enamine‐metal Lewis acid catalysis has emerged as a powerful tool to construct carbon‐carbon and carbon‐heteroatom bond forming reactions. A concise synthetic method for asymmetric synthesis of chromans from cyclohexanones and salicylaldehydes has been developed to afford tricyclic chromans containing three consecutive stereogenic centers in good yields (up to 87 %) and stereoselectivity (up to 99 % ee and 11 : 1 : 1 dr). This difficult organic transformation was achieved through bifunctional enamine‐metal Lewis acid catalysis. It is believed that the strong activation of the salicylaldehydes through chelating to the metal Lewis acid and the bifunctional nature of the catalyst accounts for the high yields and enantioselectivity of the reaction. The absolute configurations of the chroman products were established through X‐ray crystallography. DFT calculations were conducted to understand the mechanism and stereoselectivity of this reaction.more » « less
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Cortes Vazquez, Jose; Alharbi, Waad S.; Davis, Jacqkis; Moore, Alexia; Nesterov, Vladimir N.; Cundari, Thomas R.; Wang, Hong; Luo, Weiwei (, ACS Omega)
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Fernando, E. H.; Cortes Vazquez, Jose; Davis, Jacqkis; Luo, Weiwei; Nesterov, Vladimir N.; Wang, Hong (, The Journal of Organic Chemistry)
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Cortes Vazquez, Jose; Davis, Jacqkis; Nesterov, Vladimir N.; Wang, Hong; Luo, Weiwei (, Organic Letters)null (Ed.)
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