Studies on Agarofurans VI. The Introduction of Substituents to C-1 and C-2 Positions of Agarofurans

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Agarofuranoids with oxygen functions at C-1 and C-2 were synthesized by allylic oxidation.Ketone 2 gave compound 8 and 9 by Grignard reaction.The configuration of C-2 in 8 and 9 were identified by the CD spectroscopy of the benzoate 10.
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