HCID 667719, compound → HCID 15952363, compound

Participants

Reaction Steps

To a refluxing solution of acetic acid (8 ml) and sulfuric acid (2 drops) is added, dropwised, a solution of 1-(hydroxymethyl)-4-propylpyrrolidin-2-one x2 (400 mg, 2.54 mmol) in 3 ml of acetic acid. 6-chloro-2-(4-methylphenyl)imidazo[1,2-a]pyridine x267 (309 mg, 1.27 mmol, 0.5 eq) is then added in once. The reaction mixture is refluxed for 3 days. After cooling, the reaction mixture is slowly poored in 150 ml of concentrated sodium hydroxyde solution (40% wt) and the crude product is extracted by dichloromethane (4×150 ml). The cumulated organic layers are dried over MgSO4, filtered and condensed under reduced pressure leading to the crude product which is purified by flash chromatography over silicagel (hexane/ethyl acetate 80/20). 1-{[6-chloro-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]methyl}-4-propylpyrrolidin-2-one 4 is recrystallized in ethyl acetate.

Provenance & Evidence