SCHEDULED MAINTENANCE
Photocycloaddition of the dienone (5) leads to a major compound (6b) which is an intermediate in a new synthesis of β-cedrene (8). The structure of its crystalline derivative (12b) has been established by X-ray diffraction. In particular, the relative configuration of the 12-methyl and 11 -methylene (cedrene numbering) is the correct one.
M. Fetizon, S. Lazare, C. Pascard and T. Prange, J. Chem. Soc., Perkin Trans. 1, 1979, 1407 DOI: 10.1039/P19790001407
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