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Pregled bibliografske jedinice broj: 159890

Copper(I) and Silver(I) Complexes of 1, 5- Methylene- and Diethylmethylene-bridged Bis(oxazoline) Ligands. In situ Cu(II)-catalyzed Oxidation of Methylene Bridge


Čaplar, Vesna; Raza, Zlata; Roje, Marin; Tomišić, Vladislav; Horvat, Gordan; Požar, Josip; Piantanida, Ivo; Žinić, Mladen
Copper(I) and Silver(I) Complexes of 1, 5- Methylene- and Diethylmethylene-bridged Bis(oxazoline) Ligands. In situ Cu(II)-catalyzed Oxidation of Methylene Bridge // Tetrahedron, 60 (2004), 37; 8079-8087 (međunarodna recenzija, članak, znanstveni)


Naslov
Copper(I) and Silver(I) Complexes of 1, 5- Methylene- and Diethylmethylene-bridged Bis(oxazoline) Ligands. In situ Cu(II)-catalyzed Oxidation of Methylene Bridge

Autori
Čaplar, Vesna ; Raza, Zlata ; Roje, Marin ; Tomišić, Vladislav ; Horvat, Gordan ; Požar, Josip ; Piantanida, Ivo ; Žinić, Mladen

Izvornik
Tetrahedron (0040-4020) 60 (2004), 37; 8079-8087

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Bis(oxazoline); metal complex; chiral catalysts

Sažetak
Silver(I) and copper(I) complexes of C2-symmetric bis(oxazoline) ligands were studied by UV, NMR, IR, EPR and ES-MS spectroscopies. The stability constants of the Ag- 1a and Ag- 1b complexes with 1:1 and 1:2 stoichiometries in acetonitrile were determined by NMR spectrometric titrations. The evidence of tetrahedral coordination for complex (Ag(1a)2(C was obtained from the complexation induced shifts (CIS) and NOEs. Mass spectra revealed the Cu(II) mediated oxidation of methylene bridge in copper complexes of 1a and 1b, which was in accordance with the UV, NMR, IR and EPR findings. The efficiency of Cu(I) complexes of methylene-bridged 1, 5-bis(oxazoline)s 1 as chiral catalysts in stereoselective cyclopropanation of styrene with ethyl diazoacetate, was compared to that of the dialkylmethylene-bridged 1, 5-bis(oxazoline)s 2.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • CA Search (Chemical Abstracts)