been investigated using polarography, cyclic voltammetry, coulometry, a n d product analysis. TPP proceeds by a one-electron transfer to form the anion radical which undergoes cleavage of a phenyl group. The electrochemical reduction of triphenylphosphine (TPP) and triphenylphosphine oxide (TPPO) has The reduction of everal recent papers have been concerned with the S polarography of triphenylp...

Elemental sulfur (S8) was found to react very rapidly (<1 min) with a stoichiometric amount of triphenylphosphine at rt in sufficient solvent (0.2–0.5 mL solvent/1 mmol PPh3). Compared the previously described methods, present procedure constitute excellent access sulfide.

Lithium, used in conjunction with triphenylphosphine or sodium metal, produces a high yield of carbazole when reacted with phenothiazine.

2-Borylated porphyrins reacted with Pt(cod)Cl2 to give b-to-b platinum-bridged porphyrin dimers, which were converted to b-to-b directly linked porphyrin dimers through triphenylphosphine-mediated reductive elimination. Similar reactions of 2,18-diborylated Ni(II)–porphyrin and Zn(II)–porphyrin gave the corresponding doubly b-to-b platinum-bridged porphyrin dimers. Treatment of the doubly b-to-...

While the use of triphenylphosphine as a reductant is common in organic synthesis, the resulting triphenylphosphine oxide (TPPO) waste can be difficult to separate from the reaction product. While a number of strategies to precipitate TPPO are available, none have been reported to work in more polar solvents. We report here that mixing ZnCl2 with TPPO precipitates a TPPO-Zn complex in high yiel...

4-Hydroxyquinazoline undergoes neutral conditions with alkyl propiolates in the presence of triphenylphosphine (0.26g), and by α substituation the corresponding  2-(4-oxoquinazolin-3(4H)-yl acrylate was obtained in good yields.

The reactions of triphenylphosphine with the azido-ortho-closo-dicarbadodecaboranes 1-N(3)-2-R-closo-1,2-C(2)B(10)H(10) [R = Me (1a), Ph (1b)] produce the stable and isolatable carboranyl phosphazides 1-(N(3)PPh(3))-2-R-closo-1,2-C(2)B(10)H(10) [R = Me (2a), Ph (2b)] in good yields. Single crystal X-ray diffraction analysis revealed that, in the solid state, phosphazide 2a adopts an unusual s-c...

Oxygenation of Ir(2)(II,II)(tfepma)(2)(CN(t)Bu)(2)Cl(3)H (1, tfepma = CH(3)N[P(OCH(2)CF(3))(2)](2)) furnishes Ir(2)(II,II)(tfepma)(2)(CN(t)Bu)(2)Cl(3)(OOH) (2), the first isolable iridium hydroperoxo complex. This complex transfers an oxygen atom to triphenylphosphine, producing triphenylphosphine oxide and Ir(2)(II,II)(tfepma)(2)(CN(t)Bu)(2)Cl(3)(OH) (3) in high yield. Reaction of 2 with acid ...