SCHEDULED MAINTENANCE
Catalysis of the reaction between triplet oxygen and ergosteryl acetate (I) by titanium tetrachloride unexpectedly affords 6α-chloro-5-hydroxy-5α-ergosta-7,22-dien-3β-yl acetate (III). This chlorohydrin is produced by a reaction between equimolar amounts of the 5,8-peroxide (II) and the acetate (I), the generality and mechanism of which are discussed briefly.
D. H. R. Barton and R. K. Haynes, J. Chem. Soc., Perkin Trans. 1, 1975, 2065 DOI: 10.1039/P19750002065
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