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- W2014723308 abstract "Epimerizations of 16 alpha-chloro- (1a), bromo- (1b), and iodo-3 beta-hydroxy-5-androsten-17-one (1c) by a brief treatment with 0.2 equiv NaOH in aqueous pyridine reached equilibrium between 16 alpha- and 16 beta-halo ketones. 16 alpha-/16 beta-Halo ketone ratios at equilibrium were 1.5 for Cl, 1.25 for Br, and 1.0 for I. Kinetic analysis showed that compounds 1a-c were stereoselectively converted to the corresponding 16 alpha-hydroxy derivative 3 by an SN2 mechanism, in which the order of the apparent reactivity was Br greater than I greater than Cl. The hydrolysis of a number of 16 alpha-bromo-17-ketones and 2 alpha-bromo-3-ketones was carried out. The yields of the corresponding alcohols were found to depend on remote structural features in the steroids." @default.
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- W2014723308 date "1985-05-01" @default.
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- W2014723308 title "Stereoselective hydrolysis of 16α-halo-17-keto steroids and long-range substitution effects on the hydrolysis of 16α-bromo-17-ketones and 2α-bromo-3-ketones" @default.
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- W2014723308 doi "https://doi.org/10.1016/0039-128x(85)90005-4" @default.
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