TY - JOUR AU - Kamal, A; Ramana, K V; Ramana, A V; Babu, A H JO - Tetrahedron: Asymmetry VL - 14 PY - 2003 DO - 10.1016/S0957-4166(03)00548-2 SP - 2587 N1 - For instance, optically pure 3-hydroxy-2-piperidones are obtained in six steps from δ-valerolactone under harsh conditions; see: ER -