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8444224706
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37049085863
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For the catalytic asymmetric addition of a nucleophile to ynals to give optically active propargylic alcohols, see: Dialkylzinc
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0034638686
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For the enantioselective allylation of ynals with a stoichiometric chiral reagent
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Bouzbouz, S.1
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33846593979
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84945959007
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The first reported catalytic asymmetric direct Henry reaction used a heterobimetallic catalyst
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36849070344
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77957569399
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a = 13.55 in water) is more acidic than ethanol (15.9) and allyl alcohol (15.5)
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77957589960
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31P NMR analysis of a mixture of 3-phenylprop-2-yn-1-ol and the iminophosphorane only showed a sharp singlet at δ = 46.1 ppm without the formation of phosphonium alkoxide.
-
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-
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41
-
-
77957592455
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note
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31 P NMR spectrum at -98 °C.
-
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42
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77957558993
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31P NMR experiment with 4-methyl-4-nitro-1- phenylpent-1-yn-3-ol and the iminophosphorane in THF/DMF (5%) gave a sharper signal at δ = 35.8 ppm. However, the precise role of DMF is still unclear at present
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A similar 31P NMR experiment with 4-methyl-4-nitro-1-phenylpent-1-yn-3-ol and the iminophosphorane in THF/DMF (5%) gave a sharper signal at δ = 35.8 ppm. However, the precise role of DMF is still unclear at present.
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