Yttrium-biphenyldiol

CATALYTIC ASYMMETRIC EPOXIDATION OF ix,P-UNSATURATED ESTERS PROMOTED BY A YTTRIUM-BIPHENYLDIOL COMPLEX... 

A catalytic asymmetric epoxidation reaction of a,/l-unsaturated esters via conjugate addition of an oxidant using chiral yttrium-biphenyldiol-Ph3As=0 complexes has been developed. Yields up to 90% and ees up to 99% have been achieved.43... 

Kakei H, Tsuji R, Ohshima T, Shibasaki M. Catalytic asymmetric epoxidation of a,p-unsaturated esters using an yttrium-biphenyldiol complex. J. Am. Chem. Soc. 2005 127 (25) 8962-8963. 

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