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Stereochemistry of Steroids

The cardioactive glycosides are discussed in Section 14.1. For further reading on the chemistry and stereochemistry of steroids, see Shoppee (1964) for the biochemistry and pharmacology, see Briggs and Christie (1977). [Pg.505]

The terms a and are useful in describing the stereochemistry of steroid and carbohydrate systems. For steroid systems such as the isomers of 3-cholestanol in Figure 2.26, an a hydroxyl group is one that lies beneath the approximate molecular plane. ° ° Thus, 62 is 3-a-cholestanol. On the other hand, a /3 substituent lies above the approximate plane of the molecule, as shown by the structure of 3-j8-cholestanol (63). ° ... [Pg.79]

Similar NMR studies of MTPA esters showed that there was a correlation between the shape of the signals due to the CH2OH (C-26) group in the R) and (5)-MTPA esters and the absolute configuration at C-25. This new approach (i.e., comparison of the chemical shifts of the methylene protons at C-26 in the spectra of the R) and (S)-MTPA esters) has the advantage of avoiding the use of europium salts and has been widely used by researchers interested in the stereochemistry of steroid side chains. ... [Pg.44]


See other pages where Stereochemistry of Steroids is mentioned: [Pg.359]    [Pg.353]    [Pg.751]    [Pg.17]    [Pg.1134]    [Pg.1136]    [Pg.1137]    [Pg.17]    [Pg.1156]    [Pg.1157]    [Pg.278]    [Pg.1136]    [Pg.1137]    [Pg.327]    [Pg.1048]    [Pg.241]    [Pg.243]    [Pg.245]    [Pg.247]    [Pg.249]    [Pg.252]    [Pg.3226]    [Pg.3244]    [Pg.1072]   


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Of steroids

Steroids stereochemistry

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