Indole → N-(4-methylphenyl)indole

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-H-indole (58.5 mg, 0.500 mmol), 1-iodo-4-methylbenzene (0.218 g, 1.00 mmol), copper powder (32.0 mg, 0.500 mmol), and K2CO3 (0.138 g, 1.00 mmol) in 1-methyl-2-pyrrolidinone (1.00 mL) was heated at 150° C. for 12 h under argon. The resulting mixture was diluted with H2O (6 mL). The aqueous layer was extracted with CH2Cl2 (3×10 mL). The combined organic extracts were washed with brine (10 mL), dried over MgSO4, and concentrated in vacuo. The residue was purified by preparative TLC using EtOAc:hexane (1:4) to give the desired product (82.0 mg, 79.0%): 1H NMR (400 MHz, CDCl3) δ 7.67 (d, 1H, J=7.7 Hz), 7.52 (d, 1H, J=7.4 Hz), 7.38 (d, 2H, J=8.4 Hz), 7.34-7.29 (m, 3H), 7.21 (t, 1H, J=7.0 Hz), 7.15 (t, 1H, J=7.0 Hz), 6.66 (d, 1H, J=3.3 Hz), 2.43 (s, 3H); ESMS m/e: 208.0 (M+H)+.

Provenance & Evidence