Isobutanol → Methyl 2-[N-(5-bromo-2-(2-methylpropoxy)benzyl)-N-ethylamino]pyridine-5-carboxylate

Participants

Reaction Steps

A solution of the methyl-2-[N-(5-bromo-2-(hydroxy-benzyl)-N-ethylamino]pyridine-5-carboxylate (reference example 1, paragraph 7) (0.5 g, 1.37 mmol) in THF (15 ml) was treated with triphenylphosphine (0.39 g, 1.49 mmol) and diazoethyldicarboxylate. The reaction was stirred at ambient temperature for five minutes and then isobutyl alcohol (0.152, 2.06 mmol,) added. The reaction was then stirred at ambient temperature for 18 hours. partitioned between ethyl acetate and water and the aqueous layer washed with ethyl acetate (×2). The organic layers were combined, washed with water and brine, dried (MgSO4) and evaporated. The residue was subjected to chromatography (eluant: ethyl acetate/hexane) to give the title compound (0.35 g, 60%) as an off-white solid.

Provenance & Evidence