SCHEDULED MAINTENANCE
Novel silica gel-catalysed reactions of dihydroartemisinin 1b to deoxyartemisinin 11 and 11β-hydroxy-11-epidihydroartemisinin 8 to compound 9 under mild conditions are described. The structures of the products were determined by mass spectrometry and 1D- and 2D-NMR spectroscopy. A mechanism for their formation is proposed.
B. Yagen, Y. M. Pu, H. J. C. Yeh and H. Ziffer, J. Chem. Soc., Perkin Trans. 1, 1994, 843 DOI: 10.1039/P19940000843
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