Diisopropylethylamine → N-Benzyl-N-methyl-2-(1-(pyridin-4-yl)piperidin-4-yl)ethanamine

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Reaction Steps

N-Benzyl-N-methyl-2-(piperidin-4-yl)ethanamine (600 mg, 2.58 mmol, 1 eq) and 4-bromo-pyridine HBr (553 mg, 2.84 mmol, 1.1 eq) were dissolved in n-butanol (15 ml); DIPEA (2.34 ml, 12.9 mmol, 5 eq) was added, and refluxing was carried out for 16 h. After monitoring by thin-layer chromatography, the reaction mixture was concentrated and the residue was purified by column chromatography (Alox 5-7% MeOH in dichloromethane). Yield: 56% (450 mg, 1.45 mmol).

Provenance & Evidence