T. Varea et al., ASYMMETRIC-SYNTHESIS .35. SYNTHESIS OF 2-METHYL 5-SUBSTITUTED PIPERIDINES FROM CHIRAL NON-RACEMIC LACTAMS, Tetrahedron letters, 36(7), 1995, pp. 1035-1038
A series of 2-methyl-5-substituted piperidines in enantiomerically pur
e form has been synthesized from lactam 3a. The stereospecific alkylat
ion involved a rigid amide enolate.