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Chloroform/concentrated aqueous NaOH/catalyst transform testosterone acetate (1) into a mixture of the α- and β-stereoisomers of dichlorocyclopropyl derivatives (2) and tetrachlorospiropentane derivates (3). 2 are the precursors of 3. Formation of analog chloro as well as bromo derivatives of cholestenone was demonstrated.

zeitschrift für naturforschung b

Notizen: Umsetzung von Δ 4-Steroidketonen mit dem Dihalogencarbenreagens der Phasentransfer-Katalyse / Conversion of Δ 4-Steroidketones with the Dihalocarbene Reagent of Phase Transfer Catalysis