Triphenylphosphine diiodide

EPOXIDES Diphosphorus tetraiodide. Lithium. 3-Methyl-2-selenoxo-l,3-benzothiazole. Phosphorus triiodide. Lithium. Potassium iodide-Zinc-Phos-phorus(V) oxide. Samarium(II) iodide. Sodium O.O-diethyl phosphorotelluro-ate. Triphenylphosphine hydroiodide-Triphenylphosphine diiodide. 

Yields of products are low under these conditions with triphenylphosphine diiodide, but use of acetonitrile and a reaction time of about 4 days gives /3-iodo-a, j3-unsaturated ketones however, yields are only about 70%. 

T riphenylphosphine—Diethyl azodi-carboxylate, 280, 645 Triphenylphosphine dibiomide, 645-646 Triphenylphosphine dichloride, 646-647 Triphenylphosphine dihaiides, 647-648 Triphenylphosphine diiodide, 648 Triphenylphosphine ditriflate, 648 Triphenylphosphite methiodide, 649 Triphenyl phosphite ozonide, 435 Triphenyl(prop-2-ynyl)phosphonium bromide, 494 Triphenylsilanol, 655, 656 Triphenylstannane, 649 Triphenyltin hydride, 649 Triphenylvinylsilane, 637 Triphosphopyridine nucleotide, 36-37 Tri- -propyl orthovanadate, 655 Tris-annelation, 410 Ttis(aquo)hexa-fi-acetato-p,-oxotri-ruthenium acetate, 425-426,650 Tris(dimethoxyboryl)methane, 328, 329 Tris(dimethylamino)borane, 554 Trishomocubanone, 108 Tris(neomenthyldiphenylphosphine)-chlororhodium, 416... 

The coordination polymerisation of cyclic carbonates with a six-membered ring in the molecule, such as trimethylene carbonate (l,3-dioxan-2-one) and 2,2-dimethyltrimethylene carbonate (5,5-dimethyl-l,3-dioxan-2-one) [148-150], carried out in the presence of metal carboxylates e.g. zinc stearate, tin-based catalysts such as the di(w-butyl)stannic diiodide-triphenylphosphine system [151] or porphinatoaluminium compounds such as (tpp)AlOR [149] is not accompanied with decarboxylation and yields the respective polycarbonates (Table 9.2). The ring cleavage during the polymerisation of trimethylene carbonate and 2,2-dimethyltrimethylene carbonate in the presence of the above catalysts has been found [148,149,151] to occur at the C(0)-0 bond, resulting... 

The dication 2 was reduced to compound 61 with benzenethiol, triphenylphosphine, phenothiazine, or samarium diiodide (Equation 6) <1996T10375>. Electrochemical reduction occurred at —O.IOV versus Ag/0.01 M AgN03 in MeCN. 

A similar reaction was also obtained in the case of the vinyldiiodonium triflate (78) which afforded exclusively the diiodide (79) upon treatment with triphenylphosphine. ... 

Similar to the syntheses described earher, one of the classic approaches to the synthesis of gcm-diiodoalkynes involved the addition of an aldehyde to a solution of a Wittig-type reagent generated from treating triphenylphosphine with iodoform in the presence of a strong base (Scheme 7.146) [214], Moderate yields of the em-diiodide were formed, and the authors did not observe any PhjPl in this reaction. 

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