Isobutyronitrile → 3-(2-Bromophenyl)-2,2-dimethylpropanenitrile

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To a solution of isobutyronitrile (3.58 g, 52 mmol) in dry THF (30 mL) was added LiHMDS (1.0 M in THF) (80 mL, 80 mmol) at 0° C., stirred for 20 min, and to this solution was added 1-bromo-2-(bromomethyl)benzene (10 g, 40 mmol) in dry THF (70 mL). After 3 h at rt, the reaction mixture was quenched with saturated NH4Cl solution, extracted with EtOAc (2×), the combined organics were washed with H2O, brine, dried over Na2SO4, filtered and concentrated to give 9.5 g (99%) of Intermediate 24A as red wine liquid. 1H NMR (400 MHz, CDCl3) δ 7.57-7.60 (2H, m), 7.30-7.34 (1H, m), 7.12-7.17 (1H, m), 3.08 (2H, s), 1.4 (6H, s) ppm.

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