Hydrochloric Acid → HCID 22266526, compound

Participants

Reaction Conditions

Reaction Steps

DMSO (0.54 mL, 7.64 mmol) was dissolved in methylene chloride (27 mL) and the solvent was cooled at −78° C. To the solvent were added dropwise oxalyl chloride (0.4 mL, 4.58 mL), a solution of 1-butyl-3-hydroxymethyl-5,6,7,8-tetrahydro-1H-quinoline-2-one (1-015-03) (0.9 g, 3.82 mmol) in methylene chloride (20 mL) and triethylamine (1.33 mL, 9.55 mmol), and then the reaction mixture was stirred at −78° C. for 5 min. The reaction mixture was gradually warmed to room temperature, and stirred at room temperature for 20 min. To the reaction mixture was added 1 mol/L diluted hydrochloric acid (50 mL), and the reaction mixture was extracted with ethyl acetate (200 mL), washed with aqueous saturated sodium hydrogen carbonate solution (50 mL) and brine (50 mL), dried over anhydrous magnesium sulfate, and evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (toluene/ethyl acetate) to give 1-butyl-2-oxo-1,2,5,6,7,8-hexahydroquinoline-3-carboaldehyde (1-015-04) (0.5 g, 56%) as a pale yellow bubbly substance.

Provenance & Evidence