An acetal-initiated Prins bicyclization approach has been developed for the stereoselective synthesis of hexahydrofuro[3,4-c]furan lignans. This also provides a direct way to generate a new series of octahydropyrano[3,4-c]pyran derivatives in a single-step process.
![Graphical abstract: Acetal-initiated Prins bicyclization for the synthesis of hexahydrofuro-[3,4-c]furan lignans and octahydropyrano[3,4-c]pyran derivatives](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4OB00305E&imageInfo.ImageIdentifier.Year=2014)
B. V. Subba Reddy, M. Ramana Reddy, B. Sridhar and K. K. Singarapu, Org. Biomol. Chem., 2014, 12, 4754 DOI: 10.1039/C4OB00305E
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