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P2I4 Diphosphorus tetraiodide

PWiaOaolHa-arHaO 12-Tungsto-phosphoric acid, 1 132 P2I4 Diphosphorus tetraiodide, 2 143... [Pg.328]

If 1,4-dioxoalkenes are used as starting materials, the cyclization to furans includes a reduction step (Scheme 6). This can be achieved by tin(II), diphosphorus tetraiodide (P2I4), or phosphites (P(0R)3). Yields seem to be moderate to excellent <65JOC2284,74TL4179,79JOC494,85JHG495>. [Pg.355]

New reagents for the primary and secondary alcohol to alkyl iodide conversion, with inversion at secondary centres, are diphosphorus tetraiodide (P2I4), a well characterized and stable solid, and mixtures of triphenylphosphine with iodine and imidazole or with 2,4,5-tri-iodoimidazole. The P2I4 system also iodinates tertiary alcohols. Trimethylsilyl iodide is known to convert alcohols into iodides (2,128), and some more systems that are believed to generate trimethylsilyl iodide in situ have been found to effect the alcohol to iodide conversion (c/. 3,151). Trimethylsilyl chloride-sodium iodide in acetonitrile produces iodides from alcohols direct or from their trimethylsilyl ethers. Hexamethyldisilane-... [Pg.157]

See other pages where P2I4 Diphosphorus tetraiodide is mentioned: [Pg.215]    [Pg.261]    [Pg.215]    [Pg.261]    [Pg.375]    [Pg.151]    [Pg.66]    [Pg.61]    [Pg.717]    [Pg.58]    [Pg.776]    [Pg.339]   
See also in sourсe #XX -- [ Pg.2 , Pg.143 ]



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