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- W2950819304 abstract "The enantioselective addition of allylstannanes to glyoxylates and glyoxals, as well as simple aromatic and aliphatic aldehydes, catalyzed by chiral (salen)Cr(III) complexes, has been studied. The reaction proceeded smoothly for the reactive 2-oxoaldehydes and allyltributyltin in the presence of small amounts (1–2 mol %) of (salen)Cr(III)BF4 (1b) under mild, undemanding conditions. However, in the case of other simple aldehydes, the use of high-pressure conditions is required to obtain good yields. Classic chromium catalyst 1b, easily prepared from the commercially available chloride complex 1a, affords homoallylic alcohols usually in good yield and with enantiomeric purity of 50–79% ee. The stereochemical results are rationalized on the basis of the proposed model." @default.
- W2950819304 created "2019-06-27" @default.
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- W2950819304 date "2006-05-01" @default.
- W2950819304 modified "2023-10-14" @default.
- W2950819304 title "Catalytic asymmetric allylation of aldehydes using the chiral (salen)chromium(III) complexes" @default.
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- W2950819304 doi "https://doi.org/10.1016/j.tet.2006.03.032" @default.
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