Thyminato-bridged cyclic tetranuclear rhodium(III) complexes containing a sodium, calcium or lanthanoid ion as a template metal core

Crystal structures of bis[2-(pyridin-2-yl)phenyl-κ2N,C1]rhodium(III) complexes containing an acetonitrile or monodentate thyminate(1−) ligand

“…For example, some tetra-and pentanuclear Pt II complexes bridged by thym 2have been described (Khutia et al, 2011;Rauterkus & Krebs, 2004). We have also reported some cyclic tetranuclear Cp*Rh III (Cp* = pentamethylcyclopentadienyl) complexes bridged by thym 2and incorporating an another metal cation in the central hydrophilic cavity of their metallacalix[4]arene motifs (Kashima et al, 2015;Sakate et al, 2016). In contrast, monoanionic thyminate (Hthym À ) often acts as an N 1 -coordinating monodentate ligand, for example, in [{Cp*Rh(Hthym)} 2 -(-OH) 2 ] (Sakate et al, 2016), [Cp*IrCl(Hthym)(dmso)] (dmso = dimethylsulfoxide; Krä mer et al, 1991), [Pt(NH 3 ) 2 (Hthym)(Mecyto)]ClO 4 (Mecyto = 1-methylcytosine; Faggiani et al, 1981) and [(Tp Cum,Me )Zn(Hthym)]ÁEtAde {Tp Cum,-1-pyrazoryl]borate, EtAde = 9-ethyladenine; Badura & Vahrenkamp, 2002}.…”

Hydroxide complexes of the late transition metals: Organometallic chemistry and catalysis

“…[(RhCp*)2(µ-OH)3]OH has also been shown to react with thymine to form substituted hydroxide-bridged rhodium dimers. 40 Scheme 13. Synthesis of heteropolymetallic complexes.…”

Surfactant‐Mediated Synthesis of Methylene Bridged 6‐Aminouracils: Development of a Greener Protocol, Water Remediation and Preliminary Biological Screening

“…[40,41] The additional exocyclic heteroatoms of bis-pyrimidine derivatives may generate highnuclearity products with a different metal atom. [42,43] Recently, some bis-uracil derivatives were reported as SARS-CoV-2 inhibitors. [44] We presented an effective, simple, and environmentally friendly synthesis of bis(6-aminouracil-5-yl)methane derivatives from a 6-aminouracil precursor and several aldehyde derivatives, considering the dual activity of uracil derivatives towards coordination and medicinal chemistry.…”

“…Deprotonated bis(1‐methyluracil‐5‐yl)methane combines with a metal entity and produces a hybrid form between classical and metallacalix[4]arenes [40,41] . The additional exocyclic heteroatoms of bis‐pyrimidine derivatives may generate high‐nuclearity products with a different metal atom [42,43] . Recently, some bis‐uracil derivatives were reported as SARS‐CoV‐2 inhibitors [44] .…”