Diisopropylethylamine → HCID 24739475, compound

Participants

Reaction Steps

A solution of 2-(5-methyl-3-phenyl-isoxazol-4-yl)-imidazo[1,2-a]pyridin-6-ylamine (63.9 mg, 0.22 mmol) in DMF (0.2 mL) was added to a solution containing of cyclopropylacetic acid (20 μL, 0.22 mmol), N,N,N′,N′-tetramethyl-O-(benzotriazol-1-yl)uranium tetrafluoroborate (70.6 mg, 0.22 mmol), N,N-diisopropyl ethyl amine (129 μL, 1.0 mmol) in DMF (0.3 mL) and the resulting mixture stirred at room temperature for 2 h. The resulting mixture was then poured into a mixture of brine:water (1:1) and extracted with ethyl acetate. The combined organic layers were then washed with brine, dried over sodium sulphate and evaporated to leave a brown solid. Purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 50:50) afforded the title compound (44 mg, 59%) which was obtained as a light green solid. MS: m/e=373.3 [M+H]+.

Provenance & Evidence