Ca. Willoughby et Sl. Buchwald, SYNTHESIS OF HIGHLY ENANTIOMERICALLY ENRICHED CYCLIC AMINES BY THE CATALYTIC ASYMMETRIC HYDROGENATION OF CYCLIC IMINES, Journal of organic chemistry, 58(27), 1993, pp. 7627-7629
The asymmetric hydrogenation of cyclic ketimines with a chiral titanoc
ene catalyst affords amines with excellent enantioselectivity under a
variety of conditions. The reaction is general for cyclic imines of ri
ng size 5-7 and exhibits a high degree of functional group compatibili
ty.