Dichloro oxovanadium

Dichloro(2,2,2-trifluoroethoxy)oxovanadium(v) is an effective reagent for promoting a one-electron oxidative cyclization of the silyl enol ether 1073, providing the cyclopentane fused dihydrocoumarin 1074 (Equation 420) <1998JA2658>. 

Interest in the interpretation of the spectral and magnetic properties of oxo-vanadium(iv) complexes has grown as it has become apparent that the general assumption of overall C4 symmetry for these complexes is unjustified. Bis-(2-methyl-8-quinolato)oxovanadium(iv), VO(quin)2,395 and bis(tetramethylurea)dichloro-oxo-vanadium(iv), VO(tmu)2Cl2,396 for example, have been found to be five-co-ordinate with a trigonal-bipyramidal co-ordination polyhedron about the vanadium atom. A crystal-field model has been developed which gives a good account of the electronic and e.p.r. spectra of VO(quin)2. 

Dichloro(ethoxy)oxovanadium(V). Coupling of allyl and benzyl sUam. ... 

A, adenosine 5 -AMP, adenosine 5 -monophosphate AMD473, / -[ammine-dichloro(2-methyl pyridine)] platinum(II) cAMP, cyclic adenosine monophosphate BBR3464, [(rra 5 -PtCl(NH3)2)2 A-iraK5-Pt(NH3)2 (NH2(CH2) NH2)2 ] + Ben, benzene BEOV, bis(ethylmaltolato)oxovanadium(IV) Bip, biphenyl bipy, bipyridine BMOV, bis(maltolato) oxovanadium(IV) ... 

Scheme 2.50 Oxovanadium-induced ring-opening oxidation of 2,2-dichloro-3-cyclobuten-l-ones...

Ryter, K. and Livinghouse, T, Dichloro(2,2,2-trifluoroethoxy)oxovanadium(V). A remarkably effective reagent for promoting one-electron oxidative cycHzation and unsymmetrical coupling of silyl enol ethers, /. Am. Chem. Soc., 120, 2658, 1998. 

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