Synthesis of Some New 4‐Substituted N‐Benzyl‐piperidines.

Abstract

Pyridine derivativesPyridine derivatives R 0380 Synthesis of Some New 4-Substituted N-Benzyl-piperidines. -A new approach to the important intermediate N-benzyl-piperidine-4-ethanol (VII) via Knoevenagel condensation of N-benzyl-4-piperidone (I) with malodinitrile (II) is outlined. The overall yield starting from (I) is about 55%; the advantages of the new process are simplicity, inexpensiveness, and capability for scaling up. -(DOERNYEI*, G.; INCZE, M.; MOLDVAI, I.; SZANTAY, C.; Synth. Commun. 33 (2003) 13, 2329-2338; Chem. Res. Cent., Hung. Acad. Sci., H-1025 Budapest, Hung.; Eng.) -H. Haber 44-125