59331-16-7Relevant articles and documents
Reactions of Triphenylphosphine and Tributylphosphine with Tetraethylthiuram Disulfide and Diethyldithiocarbamate Complexes of Tellurium(II) and Tellurium(IV)
Kumar, R. Krishna,Aravamudan, G.,Udupa, M. R.
, p. 39 - 50 (2007/10/03)
Triphenylphosphine reduces terakis(diethyldithiocarbamato)tellurium(IV), TeL4 [L = diethyldithiocarbamate, (C2H5)2NCS2-] to the tellurium(II) complex TeL2, on which PPh3 has no effect. The reaction of the tellurium(IV) complex, TeL2X2 (X = I, Br, Cl) with PPh3 in the molar ratio of 1:1 results in the formation of TeLX, CS2 and an aminophosphonium halide, (C2H5)2NPPh3+X-. Another mole of PPh3 reduces TeLX further to elemental tellurium. The reactions of TeL3X (X = I, ClO4, PF6) systems with excess PPh3 lead interestingly to the formation of TeL2 and elemental tellurium, with the concomitant formation of CS2, (C2H5)2NPPh3+X- and (C2H5)2NC(S)PPh3+X-. The reactions were performed in dichloromethane solutions and 31P NMR spectroscopy was widely used for the identification of various phosphorus containing species.
Alkylation et acylation de la triphenylphosphinimine N-lithiee
Cristau, Henri-Jean,Kadoura, Jumaah,Chiche, Laurent,Torreilles, Eliane
, p. 515 - 520 (2007/10/02)
A new synthetic approach to primary and secondary amines using N-lithiated triphenylphosphinimine is reported.This key reagent, accessible in two steps from dibromortiphenylphosphorane and ammonia, when treated with electrophiles yields N-substituted triphenylphosphinimine derivatives.These can react to give N-mono or disubstituted triphenylphosphonium salts which upon hydrolysis lead to the corresponding primary and secondary amines.
