5-Bromo-2-furanecarboxylic acid → HCID 952706, compound

Participants

Reaction Steps

A mixture of (R)-1-azabicyclo[2.2.2]oct-3-ylamine dihydrochloride (655 mg), 5-bromofuran-2-carboxylic acid (681 mg), 1-hydroxybenzotriazole hydrate (457 mg), O-benzotriazol-1-yl-N,N,N′-tetramethyluronium tetrafluoroborate (1.069 g), and N,N-diisopropylethylamine (2.5 mL) in N,N-dimethylformamide (10 mL) was agitated until a homogenous solution was obtained, and was then allowed to stand at room temperature overnight. The solution was evaporated, and the residue was partitioned between aqueous sodium hydroxide and chloroform. The chloroform layer was dried over magnesium sulfate, filtered, and evaporated and the residue was purified by chromatography on silica gel in a solid phase extraction cartridge using ammoniated methanol/chloroform mixtures as the eluent. The compound was then dissolved in tetrahydrofuran (20 mL), excess hydrogen chloride (5 mL; 1M solution in diethyl ether) was added, and the solution was evaporated and then recrystallised from methanol/diethyl ether to give the hydrochloride salt of the title compound as a colourless solid (538 mg); MS (ES+) 299, 301 (MH+).

Provenance & Evidence