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Displacement of oxygen functions

Synthesis of Fluorinated Pyrroles As described in the previous Section 3.2.1, the availability of hydroxypyrrolidines provided convenient functionality for introduction of fluorine, and many syntheses were based on either nucleophihc displacement of oxygen functionality by fluoride or deoxyfluorination with DAST or other such reagents. In contrast, many fundamentally different methods have been used to prepare fluorinated pyrroles. [Pg.105]

Probably the most widely used method for the introduction of an oxygen function at C-21 involves the bromination of a 17a-hydroxy-20-ketopregnane, followed by displacement of the halogen by acetate ... [Pg.220]

See other pages where Displacement of oxygen functions is mentioned: [Pg.195]    [Pg.225]    [Pg.225]    [Pg.160]    [Pg.161]    [Pg.163]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.171]    [Pg.160]    [Pg.161]    [Pg.163]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.171]    [Pg.195]    [Pg.225]    [Pg.225]    [Pg.160]    [Pg.161]    [Pg.163]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.171]    [Pg.160]    [Pg.161]    [Pg.163]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.171]    [Pg.424]    [Pg.213]    [Pg.93]    [Pg.488]    [Pg.85]    [Pg.18]    [Pg.420]    [Pg.114]    [Pg.113]    [Pg.36]    [Pg.180]    [Pg.158]    [Pg.501]    [Pg.547]    [Pg.969]    [Pg.169]    [Pg.37]    [Pg.439]    [Pg.1285]    [Pg.1462]    [Pg.685]    [Pg.586]    [Pg.178]    [Pg.274]    [Pg.537]    [Pg.551]    [Pg.449]    [Pg.685]    [Pg.131]    [Pg.433]    [Pg.326]   


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Oxygen displacements

Oxygen functionalities

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