128175-83-7Relevant academic research and scientific papers
Synthesis and characterization of a palladium(0) complex with cyclophosphazene bearing two diphenylphosphine ligands and application in Suzuki-Miyaura cross-coupling
Silva, Maria das G. de O. e,Galuppo, Carolina,Tudisco, Bárbara C.,Oliveira Junior, Arnaldo G. de,Barrionuevo, Manoel V.F.,Abbehausen, Camilla,Buffon, Regina
supporting information, p. 259 - 267 (2018/06/26)
This paper describes the synthesis of a cyclophosphazene-based diphenylphosphine ligand and a new Pd(0) complex. Infrared spectroscopy (ATR-IR), ESI+-MS, 31P, 1H and 13C NMR, Raman, WD-XRF, ICP-OES and TGA analysis show the coordination of two palladium atoms per unit of cyclophosphazene. A semiempirical calculation method was employed to find the lowest energy structure among the possible ones and Density Functional Theory (DFT) was used to optimize the found structure and obtain its bond angles, dihedral angles, bond lengths, atomic distances, and to calculate the vibrational spectrum (PBE/def2-TZVP(-f)). The new Pd complex showed activity in Suzuki-Miyaura cross-coupling reactions with halobenzenes and phenylboronic acid, tolerating different functional groups.
SYNTHESIS AND CHARACTERIZATION OF NEW 1,1',3,3',5,5'-HEXACHLORO-2,4,6,1λ5,3λ5,5λ5-TRIAZATRIPHOSPHORINE SPIRO--DERIVATIVES
Pelc, Roman A.,Brandt, Krystyna,Jedlinski, Zbigniew
, p. 375 - 382 (2007/10/02)
Hitherto reported methods of substitution of 1,1',3,3',5,5'-hexachloro-2,4,6,1λ5,3λ5,5λ5-triazatriphosphorine (1) with 2,2'-dihydroxy-1,1'-biphenylene (2) enabled exclusively the preparation of tris-spiro-derivatives, it means fully substituted 1.We have found that when the reaction of 1 and 2 is carried out in bisolvent system containing THF/H2O or C6H5Cl/H2O the partial substitution is possible resulting in the corresponding mono- and bisspiro- derivatives of 1.An efficient method of preparation of novel compounds: 1,1'-spiro--3,3',5,5'-tetrachloro-2,4,6,1λ5,3λ5,5λ5- triazatriphosphorine (3) and 1,1',3,3'-bisspiro--5,5'-dichloro-2,4,6,1λ5,3λ5,5λ5-triazatriphosphorine (4) is presented.The dependence of the degree of substitution on the reaction conditions is discussed.In order to ascertain the proposed structures of the obtained compounds: 3 and 4 (Scheme 1) the corresponding phenoxy and 1-aziridinyl derivatives have been synthesized (Scheme 2, 3).The structures of all novel compounds have been confirmed by the M.S. and NMR (1H and 31P) spectroscopies.Owing to the presence of reactive chloride functions in the new compounds 3, 4 might be employed for the synthesis of various derivatives of practical importance.
