SCHEDULED MAINTENANCE
Asymmetric dihydroxylation of a series of polyoxygenated 1,3-diarylpropenes with AD-mix-α or AD-mix-β in the presence of methanesulfonamide and subsequent acid-catalysed cyclization, affords for the first time synthetic access to trans- and cis-flavan-3-ol derivatives, essentially enantiopure and in good yield.
H. van Rensburg, P. S. van Heerden and D. Ferreira, J. Chem. Soc., Perkin Trans. 1, 1997, 3415 DOI: 10.1039/A703316H
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