Sodium Hydroxide → 1-Isopropyl-6-(trifluoromethyl)-1H-indole-4-carbonitrile

Participants

Reaction Conditions

Reaction Steps

To a 10-mL microwave tube were added 4-bromo-1-(1-methylethyl)-6-(trifluoromethyl)-1H-indole (330 mg, 1.078 mmol), dicyanozinc (146 mg, 1.240 mmol), DMF (4 mL) and water (0.040 mL), and the mixture was degassed for 5 min by bubbling N2. s-Phos (48.7 mg, 0.119 mmol) and tris(dibenzylideneacetone)dipalladium(0) (49.4 mg, 0.054 mmol) were added. The tube was sealed and the mixture was heated at 120° C. for 2.5 h. 1 N NaOH (3 mL) was added and the mixture was extracted with EtOAc (3×). The extract was dried over Na2SO4 and concentrated. The residue was purified using column chromatography (Silica gel, 0 to 70% EtOAc/hexanes) to give the title compound (210 mg, 77%) as white solid. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.61 (m, 6H), 4.79 (spt, J=6.69 Hz, 1H), 6.84 (d, J=3.28 Hz, 1H), 7.59 (d, J=3.28 Hz, 1H), 7.73 (s, 1H), 7.88 (s, 1H). MS: (M+H)+=253.2.

Provenance & Evidence