Thiophosphoryl-, Thiophosphoryloxy-, and Thiophosphorylamino-Benzene Derivatives as Novel Classes of Hybrid Pincer Ligands
作者:Vladimir A. Kozlov、Diana V. Aleksanyan、Andrei A. Vasil'ev、Irina L. Odinets
DOI:10.1080/10426507.2010.507726
日期:2011.3.31
The synthetic approaches to novel families of SCE (E = S',N,O) hybrid pincer-type 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.
Cyclopalladation of <i>meta</i>-(Diphenylthiophosphoryloxy)benzaldimines: <i>NCS</i> and Unexpected <i>NCO</i> 5,6-Membered Pincer Palladium Complexes
作者:V. A. Kozlov、D. V. Aleksanyan、Yu. V. Nelyubina、K. A. Lyssenko、A. A. Vasil’ev、P. V. Petrovskii、I. L. Odinets
DOI:10.1021/om9009894
日期:2010.5.10
moderate to good yields. The same reaction in dichloromethane followed by treatment with alcohol resulted in unexpected formation of the related NCO-palladacycles 5a,b, along with the above NCS-complexes. Complexes 5 present the products of formal oxidation of the P═S group in the starting ligand, which apparently proceeds in the metal ion coordination sphere. Realization of κ3-NCS and κ3-NCO coordination