Triethylamine → 7-Bromo-2-isopropyl-4-(2-pyridin-2-yl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)-quinoline

Participants

Reaction Conditions

Reaction Steps

A 2 M solution of isopropyl magnesium chloride in tetrahydrofuran (65 μL, 0.13 mmol) is added to solution of 7-bromo-4-(2-pyridin-2-yl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)-quinoline (50.0 mg, 0.13 mmol) in tetrahydrofuran (1 mL) at room, temperature with stirring for 2 h. The mixture is cooled to −78° C. and triethylamine (21.4 μL, 0.154 mmol) and methanesulfonyl chloride (11 μL, 0.14 mmol) added. The mixture is warmed to room temperature and allowed to stand 18 h. The mixture is treated with water, extracted with ethyl acetate, dried (sodium sulfate), filtered, and concentrated in vacuo. The residue is chromatographed on SiO2 (dichloromethane to 75% ethyl acetate/dichloromethane) to yield the title compound as a solid, 4.5 mg (9%).

Provenance & Evidence