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9
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24344504082
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17744405184
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23
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0033581769
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30
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24344470402
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note
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2O).
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31
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24344503955
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note
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The signals of the protons of the methoxy groups at δ = 3.52 and 3.56 ppm were used to determine the enantiomeric purity.
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32
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24344441042
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note
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2O).
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33
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24344475025
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note
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The use of the corresponding organolithium derivative for alkylation of allyl bromide 5 led to a decrease in the yield of compound 6 due to homocoupling of the starting halogenide.
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-
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34
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24344459669
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note
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2S: C, 64.48; H, 7.58. Found: C, 64.71; H, 7.52.
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35
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24344434142
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note
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2S: C, 64.48; H, 7.58. Found: C, 64.63; H, 7.54.
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-
-
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39
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24344479392
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note
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3S: C, 54.75; H, 6.27. Found: C, 54.92; H, 6.18.
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-
-
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40
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24344497653
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note
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The (E)-configuration of the acyclic carbon-carbon double bond in compound 8 was verified on the basis of NOE experiments. Irradiation of the olefinic proton of this double bond produced a strong enhancement (15%) of the methine proton signal at δ 4.57-4.64 ppm.
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41
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24344450481
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note
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The signals of the protons of the methoxy groups at δ = 3.60 and 3.68 ppm were used to determine the enantiomeric purity.
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-
-
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42
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24344468899
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note
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3): δ 1.43-1.88 (m, 6H), 2.02 (d, J = 1.3 Hz, 1.5H), 2.09 (d, J = 1.3 Hz, 1.5H), 2.51-2.63 (m, 1H), 2.69 (s, 1.5H), 2.70 (s, 1.5H), 2.76-2.90 (m, 1H), 3.38-3.56 (m, 1H), 3.74-3.88 (m, 1H), 4.54-4.65 (m, 1H), 4.74-4.83 (m, 1H), 6.54-6.57 (m, 0.5H), 6.59-6.62 (m, 0.5H), 6.95 (s, 0.5H), 6.96 (s, 0.5H), 9.76-9.79 (m, 0.5H), 9.82-9.85 (m, 0.5H).
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