Condensation with glutaraldehyde gives a useful intermediate in asymmetric synthesis of alkaloids: Org. Synth. Coll., 9, 176 (1998). Starting material for the enantioselective synthesis of 2,6-disubstituted piperazines: Synthesis, 833 (1996), and for chiral ɑ-amino phosphonates: Org. Synth., 75, 19 (1997).