Hydrochloric Acid → HCID 17963978, compound

Participants

Reaction Steps

To a stirred mixture of 3-[(2-methoxyethoxy)methoxy]-4-methylbenzaldehyde (1.70 g) and 1,4-diacetyl-2,5-piperazinedione (1.6 g) in a mixture of N,N-dimethylformamide (17 ml) and tert-butanol (17 ml) was added potassium tert-butoxide (900 mg) at 5° C. The mixture was stirred for 24 hours at room temperature and then poured into water (300 ml). The aqueous mixture was adjusted to pH 4–5 with aqueous diluted hydrochloric acid solution and extracted with ethyl acetate. The extract was washed with brine, dried over sodium sulfate and evaporated under reduced pressure. The resulting residue was purified by column chromatography on silica gel using mixed solvents of toluene and ethyl acetate (3:1). The fractions containing the objective compound were collected and evaporated under reduced pressure to give 1-acetyl-3-[3-[(2-methoxyethoxy)methoxy]-4-methylphenyl]-methylene-2,5-piperazinedione (2.05 g) as a powder.

Provenance & Evidence