104175-35-1Relevant articles and documents
Synthesis, characterization, X-ray structural analysis, and iodination ability of benzyl(triphenyl)phosphonium dichloroiodate
Imanieh, Hossein,Ghammamy, Shahriar,Nikje, Mir Mohammad Alavi,Hosseini, Farhang,Aghbolagh, Zahra Shokri,Fun, Hoong-Kun,Khavasi, Hamid Reza,Kia, Reza
experimental part, p. 2248 - 2255 (2012/01/12)
Benzyl(triphenyl)phosphonium dichloroiodate (BTPPICl2), BnPh3P+(ICl2)-, is easily synthesized in a nearly quantitative yield by the addition of BnPh 3P+Cl- to a CH2Cl2 solution of iodine monochloride (ICl). BnPh3P+Cl - can be prepared by the reaction of Ph3P and BnCl. The compound was characterized by physicochemical and spectroscopic methods (elemental analysis, FT-IR, and 1H-NMR). The use of phosphonium counterion improves the quality of the BTPPICl2 crystals. BTPPICl2 crystallizes in the monoclinic system, and its crystal and molecular structure has been determined at 100(1) K by X-ray diffraction. The structure was solved by the direct method and had refined R value of 0.0637 for 699 reflections (I>2σ(I)), space group P21/n with a=12.4700(3), b=13.2196(3), c=14.4580(3) A, β=102.6340(10)°, V=2325.67(9) A3, and Z=4. The I-atom is coordinated by two Cl-atoms as ligands in a linear geometry. This compound is a versatile reagent for the efficient and selective iodination of organic substrates, in particular of aromatic phenols to the corresponding iodo compounds, under mild conditions. To assess the generality of method, a wide variety of phenols with electron-donating and electron-withdrawing substituents were studied. BTPPICl2 is a mild iodination reagent, which offers a new avenue for an expeditious iodination of phenols. The inexpensive, relatively non-toxic reagent, and mild conditions are the positive features of the procedure and reagent. Copyright
