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Rhodium-Catalyzed Dynamic Kinetic Resolution of Racemic Internal Allenes towards Chiral Allylated Triazoles and Tetrazoles
oleh: Simon V. Sieger, Ilja Lubins, Bernhard Breit
Format: | Article |
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Diterbitkan: | MDPI AG 2022-10-01 |
Deskripsi
A general Rh-catalyzed addition reaction of nitrogen containing heterocycles to internal allenes is reported. Starting from racemic internal allenes a dynamic kinetic resolution (DKR) provides <i>N</i>-allylated triazoles and tetrazoles. Simultaneous control of <i>N</i><sup>1</sup>/<i>N</i><sup>x</sup>-position selectivity, enantioselectivity and olefin geometry gives access to important building blocks of target-oriented synthesis. The synthetic utility is demonstrated by a gram-scale reaction and a broad substrate scope tolerating multiple functional groups. Deuterium labeling experiments and experiments with enantioenriched allenes as starting material support a plausible reaction mechanism.