A stereocontrolled approach for the construction of a highly functionalized bicyclo[3.2.0]heptane derivative embodying the bridged lactone present in the diterpene bielschowskysin is reported. The key step involves a stereoselective Cu(I)-catalyzed [2 + 2] photocycloaddition of a 1,6-diene embedded in a sugar derivative.
![Graphical abstract: Studies towards the synthesis of bielschowskysin. Construction of the highly functionalized bicyclo[3.2.0]heptane segment](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4OB02182G&imageInfo.ImageIdentifier.Year=2015)
A. Jana, S. Mondal and S. Ghosh, Org. Biomol. Chem., 2015, 13, 1846 DOI: 10.1039/C4OB02182G
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