Ligand-free Ullmann-type arylation of oxazolidinones by diaryliodonium salts

Abstract

The arylation of azaheterocycles can be considered as one of the most important processes for the preparation of various biologically active compounds. In the present work, we describe a method...

Interplay of a nitro group and metal ions: from coordinative binding to noncovalent semicoordination

“…The treatment of (PPN) 2 [M(CN) 4 ] (PPN = bis(thiphenylphosphine)iminium; M = Ni, Pd, Pt) with [Ar 1 Ar 2 I](CF 3 CO 2 ) 30 (Ar 1 /Ar 2 = 2,4,6-(MeO) 3 C 6 H 2 /4-NO 2 -C 6 H 4 ) in all possible combinations in CH 2 Cl 2 (M = Ni) or MeNO 2 (M = Pd, Pt), followed by the slow evaporation of the reaction mixtures at room temperature (RT), allowed the isolation of the three samples, whose solid-state structures were studied by single-crystal X-ray diffraction (XRD). The complexes were crystallized as solvates [Ar 1 Ar 2 I] 2 [Ni(CN) 4 ]·CH 2 Cl 2 ( 1 ·CH 2 Cl 2 ), [Ar 1 Ar 2 I] 2 [Pd(CN) 4 ]·MeNO 2 ( 2 ·MeNO 2 ), and [Ar 1 Ar 2 I] 2 [Pt(CN) 4 ]·MeNO 2 ( 3 ·MeNO 2 ).…”

“…[{2,4,6-(MeO) 3 C 6 H 2 }(4-NO 2 -C 6 H 4 )I](CF 3 CO 2 ) was prepared according to the known procedure. 30 (PPN) 2 [M(CN) 4 ] (M = Ni, Pd) were synthesized by the reported method 19 and (PPN) 2 [Pt(CN) 4 ] was obtained analogously using K 2 [Pt(CN) 4 ] as the starting material. The HRESI mass spectrometry data were obtained on a Bruker micrOTOF spectrometer equipped with an electrospray ionization source; MeOH was used as the solvent.…”