Triethylamine → Diisopropyl Ether

Participants

Reaction Steps

To a mixture of 2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethylamine (1.17 g, 4.34 mmol) and triethylamine (1.08 g, 10.8 mmol) in chloroform (30 ml) was added nicotinoyl chloride hydrochloride (0.96 g, 5.4 mmol) in one portion. The mixture was stirred for 1 hour at room temperature. The solution was diluted with methylene chloride (DCM) and washed with brine and dried over anhydrous MgSO4. The solution was concentrated and the crude product was purified by flash chromatography over a silica gel column (SiO2, 25 g; eluted with DCM and 1-3% MeOH in DCM). The free base thus purified weighed 1.7 g. This product was treated with 1 M·HCl in ethanol and recrystallized twice from methanol:isopropyl ether to yield white crystals, 1.19 g, m.p. 243°-245° C. as a dihydrochloride hydrate.

Provenance & Evidence