33557-98-1Relevant academic research and scientific papers
Synthesis, catalytic activity, and photophysical properties of 5,6-membered Pd and Pt SCS′-pincer complexes based on thiophosphorylated 3-amino(hydroxy)benzoic acid thioanilides
Aleksanyan,Kozlov,Nelyubina,Lyssenko,Puntus,Gutsul,Shepel,Vasil'Ev,Petrovskii,Odinets
experimental part, p. 1535 - 1546 (2011/04/14)
Novel unsymmetrical SCS′-pincer ligands, 1-[PhNHC(S)]-3-[Ph 2P(S)NH]-C6H4 (3) and 1-[PhNHC(S)]-3-[Ph 2P(S)O]C6H4 (7), bearing a thiocarbamoyl moiety in combination with thiophosphorylamino- and thiophosphoryloxy-donating groups, respectively, were obtained via thiophosphorylation of 3-amino- and 3-hydroxy-benzoic acid (thio)anilides 1 and 6. Direct cyclometallation of the central benzene ring in the ligands 3 and 7 in reaction with (PhCN) 2MCl2 (M = Pd, Pt) as a metal precursor afforded κ3-SCS′-hybrid pincer complexes 8, 9 with 5- and 6-membered fused metallacycles in good to high yields (67-95%). The complexes 8 and 9 were characterized by multinuclear NMR (31P, 1H, 13C) and IR spectroscopy as well as single-crystal X-ray crystallography. Palladium complexes 8a and 9a were shown to be active catalysts for the Suzuki-Miyaura cross-coupling reaction. In the solid state the ligands 3 and 7 as well as their Pt(ii) and Pd(ii) complexes 8 and 9 are luminescent at 300 K. The emission of the complexes has the different origin depending on the metal nature.
Thiophosphoryl-, thiophosphoryloxy-, and thiophosphorylamino-benzene derivatives as novel classes of hybrid pincer ligands
Kozlov, Vladimir A.,Aleksanyan, Diana V.,Vasilev, Andrei A.,Odinets, Irina L.
scheme or table, p. 626 - 637 (2011/06/22)
The synthetic approaches to novel families of SCE (E = S',N,O) hybrid pincertype ligands bearing thophosphoryl, thiophosphoryloxy, and thiophosphorylamino groups in various combinations with thiophosphoryl-, thiocarbamoyl-, and imine- (including that of benzothiazole ring) donating functions have been developed. All of the ligands readily undergo direct cyclometallation (metal = Pd(II), Pt(II)) to afford 5,5- or 5,6-membered pincer complexes. Palladium complexes displayed from high to excellent catalytic performance in the Suzuki cross-coupling reaction of aryl bromides and phenylboronic acid and the higher asymmetry for a complex served as a factor of its higher catalytic activity. Copyright Taylor & Francis Group, LLC.
