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• W2333348542 abstract "A valuable class of new heterocyclic and alicyclic prochiral α-aminomethylacrylates has been conveniently synthesized through a three-step transformation involving a Baylis–Hillman reaction, O-acetylation, and a subsequent allylic amination. The corresponding novel β2-amino acid derivatives were prepared with excellent enantioselectivities and high yields by catalytic asymmetric hydrogenation using the catalyst rhodium(Et-Duphos) (Et-Duphos=2′,5′,2′′,5′′-tetraethyl-1,2-bis(phospholanyl)benzene)) under mild reaction conditions (up to 99 % ee and S/C=1000). The influence of the substrate on the enantioselectivity and reactivity is investigated, and the most suitable substrate configuration for the highly efficient enantioselective hydrogenation of β-substituted α-aminomethylacrylates under the Rh–Duphos system is reported. The current protocol provides a very practical, facile, and scalable method for the preparation of heterocyclic and alicyclic β2-amino acids and their derivatives." @default.
• W2333348542 created "2016-06-24" @default.
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• W2333348542 date "2013-06-17" @default.
• W2333348542 modified "2023-09-28" @default.
• W2333348542 title "Highly Efficient Synthesis of Heterocyclic and Alicyclic β²-Amino Acid Derivatives by Catalytic Asymmetric Hydrogenation" @default.
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• W2333348542 doi "https://doi.org/10.1002/asia.201300339" @default.
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