2-Chlorobenzaldehyde → HCID 19864524, compound

Participants

Reaction Steps

A solution of N-(pyrid-2-yl)-3-aminocrotonamide (0.50 g, 2.8 mM), 2-chlorobenzaldehyde (0.39 g, 2.8 mM) and 4-(2-methylimidazo[4,5-c]pyrid-1-yl)butyl 3-(4-fluorophenyl)-3-oxopropionate (1.04 g, 2.8 mM--see Preparation 1) in absolute ethanol (15 cm3) was heated at reflux, under nitrogen, for 5 hours. The cooled solution was evaporated to dryness and the residue purified by column chromatography on silica (Merck "Kieselgel 60"--Trade Mark) eluting with dichloromethane:methanol 97:3. The pure product-containing fractions were evaporated to dryness and the residual foam was re-dissolved in dichloromethane (2 cm3). Addition of ether (25 cm3) caused the product to crystallize out, yield 0.21 g, (12%), m.p. 129°-132°.

Provenance & Evidence