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Issue 7, 1970
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Crystal structure and absolute configuration of the diterpenoid, methyl 6α-bromo-12-methoxy-7-oxopodocarpate

Abstract

The diterpenoid, of composition C19H23BrO4, crystallises in space group P212121 with cell parameters of a= 10·85, b= 11·16, and c= 15·05 Å. Three-dimensional X-ray structural analysis reveals the bromine atom in the α-configuration and verifies the stereochemistry at the other asymmetric centres. The conformation of ring B is nearly that of a classical boat with the oxygen atom of the associated carbonyl group twisted out of the plane of the molecule. The absolute configuration has been established. The final R value is 0·076.

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Article type: Paper
DOI: 10.1039/J39700000887
J. Chem. Soc. C, 1970, 887-892

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    Crystal structure and absolute configuration of the diterpenoid, methyl 6α-bromo-12-methoxy-7-oxopodocarpate

    G. R. Clark and T. N. Waters, J. Chem. Soc. C, 1970, 887
    DOI: 10.1039/J39700000887

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