N2-(5-Ethyl-6-methyl-pyrimidin-4-yl)-N1,N2-bis[(4-methoxyphenyl)methyl]butane-1,2-diamine → N2-(5-Ethyl-6-methyl-pyrimidin-4-yl)butane-1,2-diamine

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Reaction Steps

N2-(5-Ethyl-6-methyl-pyrimidin-4-yl)-N1,N2-bis[(4-methoxyphenyl)methyl]butane-1,2-diamine (353 mg, 0.787 mmol) was dissolved in acetic acid (2 ml), the vial was flushed with argon, palladium (10% on activated carbon, 109 mg, 0.102 mmol) was added, and the mixture was stirred in an atmosphere of hydrogen at room temperature overnight. The mixture was filtered, the filter residue was washed with acetic acid, the combined filtrates were concentrated under reduced pressure to yield 472 mg of a brown oil. The residue was dissolved in DCM, washed with a saturated solution of sodium bicarbonate, the combined aqueous solutions were extracted three times with DCM. The organic phases were combined and concentrated under reduced pressure, the residue was purified by column chromatography (silica, gradient from DCM to a 9 to 1 mixture of DCM and 7N NH3 in methanol) to yield 94.6 mg of a yellow oil. The oil was dissolved in a mixture of diethylether and DCM, 1M HCl in diethylether was added until the product precipitated. The precipitate was isolated by decantation, washed with diethylether and dried in stream of nitrogen and under reduced pressure to give 127 mg of a white solid (0.498 mmol, 63%). MS (ESI) m/z=209.2 [M+1]+.

Provenance & Evidence