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- W2058684703 abstract "The development of a Zr(IV)-catalyzed Mannich-type reaction led to the discovery of an air-stable Lewis acid catalyst which can be reisolated and reused with virtually no erosion of activity and enantioselectivity. Silyl enol ethers, silyl ketene acetals, and silyl ketene thioacetals are all suitable nucleophilic precursors for the Mannich-type reaction with 2-aminophenol-derived imines. Both aliphatic and aromatic imines work well, affording products in good to quantitative yields and good to excellent enantioselectivities. Interestingly, the catalysts derived from (R)-6,6′-dibromo BINOL and (S)-6,6′-(C2F5)2 BINOL appear to afford the identical product enantiomer." @default.
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- W2058684703 date "2006-11-01" @default.
- W2058684703 modified "2023-10-16" @default.
- W2058684703 title "Air-Stable Zr(IV) Catalysts for Asymmetric Mannich Reactions" @default.
- W2058684703 doi "https://doi.org/10.1055/s-2006-949437" @default.
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