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The Global ETD Search service is a free service for researchers
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Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 1 of 1 (0.046 seconds)Spelling suggestions: "subject:"414 hydroxyl"" "subject:"m414 hydroxyl""
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Control of the stereochemistry of C14 hydroxyl during the total synthesis of withanolide E and physachenolide CAnees, Muhammad, Nayak, Sanjit, Afarinkia, Kamyar, Vinader, Victoria 27 November 2018 (has links)
Yes / The stereochemical outcome of the epoxidation of Δ14–15 cholestanes with mCPBA is controlled by the steric bulk of a C17 substituent. When the C17 is in the β configuration, the epoxide is formed in the α face, whereas if the C17 is trigonal (flat) or the substituent is in the α configuration, the epoxide is formed in the β face. The presence of a hydroxyl substituent at C20 does not influence the stereochemical outcome of the epoxidation. / We thank University of Bradford for a bursary (MA).
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