4-Chloropyridine hydrochloride → HCID 20039822, compound

Participants

Reaction Steps

A mixture of 4-(4-nitrophenyl)piperidine [J. Chem. Soc. (B), 128, 1970] (4.12 g), 4-chloropyridine hydrochloride (3.00 g), sodium bicarbonate (5.04 g) and n-butanol (60 ml) was heated under reflux for 48 hours and then evaporated. The residue was partitioned between water and ethyl acetate. The organic phase was washed with water, dried (Na2SO4) and evaporated to give a solid which was chromatographed on silica gel. The column was eluted initially with ethyl acetate and then the eluent polarity was gradually increased to ethyl acetate/methanol (10:1). Earlier fractions contained impurity and the product was eluted in the later fractions. The product-containing fractions were combined and evaporated, and the residue was crystallised from ethyl acetate to give the title compound, (0.25 g), m.p. 173°-174°.

Provenance & Evidence