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- W2067992079 abstract "Abstract A set of enantiomerically pure Lewis bases containing different diphenyl phosphinyl oxide groups were easily synthesized in a straightforward procedure by reaction of readily available proline-based scaffolds and phosphinoyl chlorides. The newly synthesized derivatives were employed (0.1 mol equiv) as organocatalysts in the Lewis acid-mediated Lewis base-promoted direct stereoselective aldol reactions of activated thioesters with aromatic aldehydes, carried out in the presence of tetrachlorosilane and a tertiary amine. β-Hydroxy thioesters were obtained in moderate to high yields, with very high syn diastereoselectivities (dr up to >98:2), and fair enantioselectivities (ee up to 51%). Theoretical studies were performed in order to elucidate the origin of the stereoselection." @default.
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- W2067992079 date "2012-09-01" @default.
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- W2067992079 title "Readily available (S)-proline-derived organocatalysts for the Lewis acid-mediated Lewis base-catalyzed stereoselective aldol reactions of activated thioesters" @default.
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- W2067992079 doi "https://doi.org/10.1016/j.tet.2012.07.062" @default.
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