Conclusions
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1.
The reaction of 16-methylpregna-5,16-dien-3β-ol-20-one with iodobenzene diacetate in a methanolic alkali solution proceeds with a Favorskii rearrangement, with formation of 16-methylpregna-5, 16-dien-3β-ol-21-ic acid and its methyl ester.
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2.
A new method for the synthesis of 21-hydroxy-16α,17α-epoxy-20-ketosteroids from 16β-methyl-16α,17α-epoxypregn-5-en- 3β-ol-20-one has been proposed.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2610–2615, November, 1988.
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Turuta, A.M., Kamernitskii, A.V., Korobov, A.A. et al. Transformed steroids. 172. Reaction of 16-methyl-20-ketosteroids with iodobenzene diacetate. Russ Chem Bull 37, 2352–2356 (1988). https://doi.org/10.1007/BF00959895
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DOI: https://doi.org/10.1007/BF00959895