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30
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0344114912
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note
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All new compounds obtained in this study were fully characterized by spectroscopic and elemental analyses, see the supporting information.
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0031797589
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0344977465
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note
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According to this procedure the acetal group serves as a protecting group for the carboxylic group. Since the base-tolerant protection of this group is not easy, the acetal protocol offers a useful method.
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