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A communication has been reported
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18
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0000758313
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In spite of use of 7 (70% ee), a specific optical rotation of 1 was nearly the same value reported one. Although the reason remains unclear, a resolution of excess enantiomers with achiral phase chromatography may occur
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In spite of use of 7 (70% ee), a specific optical rotation of 1 was nearly the same value reported one. Although the reason remains unclear, a resolution of excess enantiomers with achiral phase chromatography may occur. Takahata H., Takahashi S., Kouno S., and Momose T. J. Org. Chem. 63 (1998) 2224
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Takahata, H.1
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Momose, T.4
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20
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67651132132
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note
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The isolated products are inseparable diastereomeric mixtures (6™ position).
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21
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67651104302
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note
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Although C-5 epimer of 2 or 4 may exist in a reaction mixture, we could not isolate that.
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22
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67651126072
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note
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The prepared samples were not always pure and contained very few diastereomers.
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