%0 Journal Article
%T Chiral Cu(II) salen complexes catalyzed aerobic oxidative biaryl coupling-probing the reaction by EPR
%A Subbaramanian Sabarinathan
%A Gnanasambandam Vasuki
%A Pillutla Sambasiva Rao
%J European Journal of Chemistry
%D 2010
%I 
%R 10.5155/eurjchem.1.4.360-367.221
%X Aerobic oxidative coupling of 2-naphthol to 1,1'-binaphthyl-2,2'-diol has been achieved using chiral/achiral copper salen complexes as catalyst. Moderate enantioselectivity was obtained for the reaction of 2-napthol with a coordinating substituent with a chiral salen complex. Unsubstituted 2-naphthol resulted in racemic 1,1'-binaphthyl-2,2'-diol only with all chiral complexes. Electron paramagnetic resonance spectroscopy has been used to understand the factors influencing the asymmetric induction.
%K Biaryl coupling
%K Chiral copper salen complexes
%K Cross coupling
%K BINOL
%K Aerobic oxidation
%K EPR
%U http://www.eurjchem.com/index.php/eurjchem/article/view/221