Reduction of ergosterol alkoxide derivatives with lithium metal gives better yields of the 7(8)-reduced product brassicasterol than previous procedures; the mixed products of the reduction are easily converted into ergosta-2,22-dien-6-one, a convenient intermediate for brassinolide synthesis.
D. H. R. Barton, X. Lusinchi, L. Magdzinski and J. S. Ramirez, J. Chem. Soc., Chem. Commun., 1984, 1236 DOI: 10.1039/C39840001236
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