K. Inomata et Y. Ukaji, DEVELOPMENT OF NEW ASYMMETRIC REACTIONS UTILIZING TARTARIC ACID ESTERAS A CHIRAL AUXILIARY - DESIGN OF AN EFFICIENT CHIRAL DINUCLEATING SYSTEM, Reviews on heteroatom chemistry, 18, 1998, pp. 119-140
In order to develop a practical method for the construction of chiral
molecules, we have designed a novel chiral system possessing two metal
centers utilizing tartaric acid esters. Based on this concept, an asy
mmetric Simmons-Smith reaction, asymmetric 1,3-dipolar cycloadditions
of nitrile oxides and nitrones, and an asymmetric nucleophilic additio
n of dialkylzincs to nitrones can be achieved with an unprecedentedly
high level of stereocontrol.