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33748844552
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A completely different coupling pattern for 11a-H (and 1-H as well) would be expected if the configuration of 1-H and/or 2-H was inverted
-
A completely different coupling pattern for 11a-H (and 1-H as well) would be expected if the configuration of 1-H and/or 2-H was inverted.
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30
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33748827624
-
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note
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Further details of the crystal structure investigations are available on request from the Fachinformationszentrum Karlsruhe, Gesellschaft für wissenschaftliche Information mbH, D-76344 Eggenstein-Leopoldshafen, on quoting the depository number CSD-405683.
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33748844122
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note
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The aldehydes 10 and 19 were immediately cyclized because attempts to purify them by flash chromatography or Kugelrohr distillation resulted in complete racemization. The same result was also observed, when they were stored for 12 h at +4°C under argon.
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