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• W2786905963 abstract "Aldol reactions belong to the most frequently used C–C bond forming transformations utilized particularly for the construction of complex structures. The selectivity of these reactions depends on the geometry of the intermediate enolates. Here, we have reacted octyl pentafluoro-λ 6 -sulfanylacetate with substituted benzaldehydes and acetaldehyde under the conditions of the silicon-mediated Mukaiyama aldol reaction. The transformations proceeded with high diastereoselectivity. In case of benzaldehydes with electron-withdrawing substituents in the para -position, syn -α-SF 5 -β-hydroxyalkanoic acid esters were produced. The reaction was also successful with meta -substituted benzaldehydes and o -fluorobenzaldehyde. In contrast, p -methyl-, p -methoxy-, and p -ethoxybenzaldehydes led selectively to aldol condensation products with ( E )-configured double bonds in 30–40% yields. In preliminary experiments with an SF 5 -substituted acetic acid morpholide and p -nitrobenzaldehyde, a low amount of an aldol product was formed under similar conditions." @default.
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• W2786905963 date "2018-02-08" @default.
• W2786905963 modified "2023-10-10" @default.
• W2786905963 title "<i>Syn</i>-selective silicon Mukaiyama-type aldol reactions of (pentafluoro-λ⁶-sulfanyl)acetic acid esters with aldehydes" @default.
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• W2786905963 doi "https://doi.org/10.3762/bjoc.14.25" @default.
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