Resolving agent for chiral bases: Helv. Chim. Acta, 41, 181 (1958). Reduction to the alcohol followed by reaction with benzaldehyde gives a bicyclic lactam which is a useful chiral synthon: J. Org. Chem., 51, 3140 (1986); Tetrahedron Lett., 32, 1379 (1991). For use in an efficient synthesis of quinolizidine and indolizidine alkaloids, see: J. Org. Chem., 60, 717 (1995).