4-Methylmorpholine → HCID 11647294, compound

Participants

Reaction Conditions

Reaction Steps

3-phenylpropylamine (270 mg, 2.0 mmol) and N-methylmorpholine (0.444 ml, 4.0 mmol) were added to a solution of (4-dimethylamino-1-hydroxy-4-pyridin-2-yl-cyclohexyl)acetic acid (556 mg, 2.0 mmol) in abs. dimethylformamide (30 ml) under argon. The solution was cooled to 0° C., dicyclohexylcarbodiimide (825 mg, 4.0 mmol) was added and the mixture was stirred at RT for 5 d. Working up of the mixture was carried out by separating off the urea which had precipitated out and introducing the filtrate into a mixture of saturated NaCl solution (40 ml) and saturated NaHCO3 solution (10 ml). Still further urea thereby precipitated out and was separated off. The aqueous phase was diluted with water (300 ml), 5 M sodium hydroxide solution (7 ml, 35 mmol) was added and the mixture was stored at 5° C. for 16 h. The crude product thereby precipitated out as a beige-coloured oily compound (22.8 mg, 30%). After chromatography on silica gel (40 g) with EA/methanol (4:1), the amide was obtained as a beige-coloured oil in a yield of 27% (203 mg).

Provenance & Evidence