Aminophosphines derived from morpholine and N-methylpiperazine: Synthesis, oxidation reactions and transition metal complexes

Cross‐coupling reactions in water using ionic liquid‐based palladium(II)–phosphinite complexes as outstanding catalysts

“…The complexes 1b and 2b exhibit large 1 J PtP coupling of 4273.6 and 4082.4 Hz, respectively, which are characteristic of phosphinites having mutual cis arrangement (Fig. S2) . 1 H NMR spectral data of 1b and 2b are consistent with the proposed structures.…”

Synthesis and characterization of tris{2-(N,N-bis(diphenylphosphino) aminoethyl} amine derivatives: Application of a palladium(II) complex as a pre-catalyst in the Heck and Suzuki cross-coupling reactions

“…The new hexadentate phosphinoamine was prepared from the commercially available starting material tris (2-aminoethyl) [42][43][44][45]. It has been found that the solvent has a significant influence on the reaction rate and on the reaction product.…”

Aminophosphines: their chemistry and role as ligands and synthons

“…There are some noteworthy points to be mentioned: (a) aminophosphines bind to metal centres quite easily under relatively mild conditions;111, 179, 180 (b) in all the studies, the metals are bound essentially through phosphorus and not through nitrogen centres. This is presumably because the nitrogen lone pair is involved in negative hyperconjugation with phosphorus‐based orbitals in aminophosphines; (c) in almost all the studies made, the soft aminophosphine ligands were used for coordinating with soft metal centres with relatively lower oxidation states like Mo(0), Cu(I), Mo(0), Ru(I), Ru(II), Rh(I), Pd(II), Ag(I), W(0), Ir(I), Pt(II) and Au(I); (d) aminophosphine‐bound metal complexes crystallize easily and in most of the cases, X‐ray structures have been solved;181–187 (e) whenever aminophosphine ligands containing two donor sites are employed, they bind to the metal centre in a bidentate fashion as expected;188 (f) different structural variety of aminophosphine ligands have been tried and, in all cases, either mono‐ or di‐substituted complexes, [MX n L] or [MX n L 2 ] (L = aminophosphine ligand) were obtained;111, 179, 185, 186 (g) in certain cases, under suitable conditions, the metal complex [MX n L] formed has dimerized to [MX n L] 2 due to coordinative unsaturation;111, 189 (h) in the case of Pt complexes, 1 J ( 195 Pt‐ 31 P) values have been useful for elucidating the structures;50 (i) in rare cases where sterically demanding mesityl groups [2,4,6‐C 6 H 2 (CH 3 ) 3 ] are bound to phosphorus centre (one of the bonds being PN), bi‐ and tri‐nuclear complexes were obtained;187 (j) the term ‘hybrid electron‐rich aminophosphines’ is used178f, 179 for those phosphines containing two amino groups and one alkyl or aryl substituent (Fig. 10).…”