Enantioselective synthesis of highly oxygenated acyclic quaternary center-containing building blocks: Via palladium-catalyzed decarboxylative allylic alkylation of cyclic siloxyketones

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Abstract

The development of a palladium-catalyzed enantioselective decarboxylative allylic alkylation of cyclic siloxyketones to produce enantioenriched silicon-tethered heterocycles is reported. The reaction proceeds smoothly to provide products bearing a quaternary stereocenter in excellent yields (up to 91% yield) with high levels of enantioselectivity (up to 94% ee). We further utilized the unique reactivity of the siloxy functionality to access chiral, highly oxygenated acyclic quaternary building blocks. In addition, we subsequently demonstrated the utility of these compounds through the synthesis of a lactone bearing vicinal quaternary-trisubstituted stereocenters.

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Ngamnithiporn, A., Iwayama, T., Bartberger, M. D., & Stoltz, B. M. (2020). Enantioselective synthesis of highly oxygenated acyclic quaternary center-containing building blocks: Via palladium-catalyzed decarboxylative allylic alkylation of cyclic siloxyketones. Chemical Science, 11(40), 11068–11071. https://doi.org/10.1039/d0sc04383d

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