2000 pyridine derivatives

pyridine derivativesR 0380

42 - 123Preparation of Polysubstituted Piperidines via Radical Cyclization.— Title compounds are prepared by intramolecular cycloaddition of unstableα-aminoalkyl radicals [generated from (III)] to unactivated double bonds. Whenan aryl group is attached to the α-aminoalkyl moiety as in compound (IX),[1,2]-aza-Wittig rearrangement occurs as main reaction instead of cyclization.This latter rearrangement type is further studied, using amines (XII) as startingcompounds. — (KATRITZKY, ALAN R.; LUO, ZHUSHOU; FANG, YUN-FENG; FENG, DAMING; GHIVIRIGA, ION; Perkin 2 (2000) 7, 1375-1380;Cent. Heterocycl. Comp., Dep. Chem., Univ. Fla., Gainesville, FL 32611,USA; EN)

1