Borane;tetrahydrofuran → HCID 62740634, compound

Participants

Reaction Steps

To an ice-cold mixture of crude 3-(3-bromophenyl)-2,2-dimethylpropanenitrile (71) (3.0 g, 12.6 mmol) in anhydrous THF (20 mL) was added BH3-THF (20 mL of a 1M solution in THF, 20 mmol) slowly. The reaction was allowed to warm slowly and stirred for 19 h. The reaction was quenched with the dropwise addition of 6 M HCl then stirred for 1.5 h. Volatiles were removed under reduced pressure. The aqueous layer was extracted with diethyl ether twice then EtOAc was added and the mixture was made basic with 5 M aqueous KOH. The layers were separated and the aqueous layer was extracted with EtOAc twice. The combined organics were washed with brine, dried over Na2SO4 and concentrated under reduced pressure to give 3-(3-bromophenyl)-2,2-dimethylpropan-1-amine as a light yellow oil (2.3 g). This material was taken on to the next step without further purification. 1H NMR (400 MHz, CDCl3) δ 7.32-7.35 (m, 1H), 7.30 (t, J=1.7 Hz, 1H), 7.13 (t, J=7.7 Hz, 1H), 7.06 (dd, J=7.6, 1.2 Hz, 1H), 2.50 (s, 2H), 2.47 (s, 2H), 0.84 (s, 6H).

Provenance & Evidence