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Polymer-supported hypervalent iodine reactions

Ley and co-workers applied the polymer-supported hypervalent iodine reagents, poly(diacetoxyiodo)styrene (PDAIS) or polybis(trifluoroacetoxyio-do)styrene (PBTIS) to the above-mentioned spiroannulation reaction. They succeeded in the concise syntheses of ( )-oxomaritidine (40) and ( )-epimari-tidine (41) using this methodology as the key steps [116] (Scheme 26). [Pg.233]

Oxidative iodination of aromatic compounds by the combination of a hypervalent iodine reagent with iodine is a synthetically important reaction (Section 3.1.4) [34]. Polymer-supported diacetate 4 is a particularly convenient reagent for oxidative iodination since it can be regenerated and reused many times. Reagent 4 gives the best results for the iodination of electron-rich arenes 13, with predominant formation of the para-substituted products 14 (Scheme 5.8) [12,21]. [Pg.384]

See other pages where Polymer-supported hypervalent iodine reactions is mentioned: [Pg.263]    [Pg.189]    [Pg.381]    [Pg.383]    [Pg.11]    [Pg.391]    [Pg.3]    [Pg.185]    [Pg.245]    [Pg.516]    [Pg.478]    [Pg.390]    [Pg.479]    [Pg.592]    [Pg.354]    [Pg.51]   
See also in sourсe #XX -- [ Pg.211 , Pg.212 , Pg.213 , Pg.214 , Pg.215 , Pg.216 , Pg.217 , Pg.218 , Pg.219 ]



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