Methyl iodide → HCID 89924204, compound

Participants

Reaction Steps

To a solution of 8-(4-bromo-1H-pyrazol-1-yl)-2-azaspiro[4.5]decan-3-one (mixture of intermediate 30 and 31 obtained in step 5; 4 g, 13.4 mmol) in DMF (10 mL) was added sodium hydride (60%) (0.8 g, 0.0116 mol) followed by methyl iodide (2.2 mL, 14.8 mmol) at 0° C. The reaction mixture was slowly allowed to warm to RT and stirred for 1 h. The reaction mixture was quenched with water and extracted with ethyl acetate. Combined organic phases were washed with water (50 mL) and brine (50 mL), dried over sodium sulphate, filtered and concentrated. Purification by flash chromatography on silica (Pet. ether: ethyl acetate) afforded the title compound (mixture of two isomers) as an off white solid (1.8 g, 43%). 1H NMR (400 MHz, DMSO-d6) δ 8.04-8.03 (m, 1H), 7.51-7.50 (m, 1H), 4.16-4.10 (m, 1H), 3.24 (s, 1H), 3.09 (s, 1H), 2.70-2.69 (m, 3H), 2.21 (s, 1H), 2.09 (s, 1H), 1.90-1.86 (m, 6H), 1.79-1.54 (m, 2H).

Provenance & Evidence