Conformational isomerism in 3-(Z)-isobutylidene-1-acetylpiperazine-2,5-dione
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The title compound, C10H14N2O3, (I), is a key intermediate in the synthesis of the cyclic dehydropeptide albonoursin, which has been found to exhibit useful biological and pharmacological properties. It crystallizes with two molecules in the asymmetric unit with different conformational structures. The methylpropylidene side chain is found to be in the Z configuration about the C=C double bond for both molecules.
ACTA Crystallographica Section E - Structure Reports Online
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