Bridged (β-alkoxyalkyl)CoIII(salen) complexes by intramolecular alkoxycobaltation of unactivated alkenes: new models for coenzyme B12
作者:Rolf Blaauw、Irene E. Kingma、Jan H. Laan、Juul L. van der Baan、Sijbe Balt、Martinus W. G. de Bolster、Gerhard W. Klumpp、Wilberth J. J. Smeets、Anthony L. Spek
DOI:10.1039/b000196l
日期:——
but-2-en-1-yl (6c), but-3-en-1-yl (6d)] react with oxygen and alcohols to give organocobalt(III) complexes containing a β-alkoxy-substituted three- or four-carbon bridge between cobalt and the equatorial ligand. NMR and UV–VIS spectroscopic studies show that product formation is a three-stage process involving (1) oxidation of cobalt(II) to produce an (alkoxo)cobalt(III) complex, (2) intramolecular interaction
Intramolecular alkoxycobaltation: a novel route to the cobalt–carbon bond in a coenzyme B<sub>12</sub>model
作者:Irene E. Kingma、Marten Wiersma、Juul L. van der Baan、Sijbe Balt、Friedrich Bickelhaupt、Martinus W. G. de Bolster、Gerhard W. Klumpp、Anthony L. Spek
DOI:10.1039/c39930000832
日期:——
CoII(salen) derivatives whose ethanediyl moiety carries an Ï-alkenyl side chain react with oxygen and methanol or ethanol to give, via interaction between intermediate CoIII species and the pendant olefin, alkylated products with a β-alkoxy substituted carbon bridge between cobalt and the equatorial ligand; the corresponding intermolecular reaction between CoII(salen) and hex-1-ene does not take place.