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The partial synthesis of harringtonine from cephaltotaxine has been described. A key intermediate, 5, 5-dimethyl-2-hydroxytetrahydrofuran-2-carboxylic acid (V), prepared from 4-methyl-1, 4-valerolactone, was dehydrated smoothly to give 5, 5-dihydrofuran-2-carboxylic acid (VI), Through its sodium salt, VI was converted into the corresponding acyl chloride(More)
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