Methyl iodide → 4,5,6-triiodo-1,2,3,3-tetramethyl-3H-indolium iodide

Participants

Reaction Steps

0.6 g (1.1 mmol) of 4,5,6-triiodo-2,3,3-trimethyl-3H-indole and 0.78 g (5.5 mmol) of iodomethane were heated at 30-40° C. for 20 hours in a sealed tube. The formed precipitate was filtered, and washed with small amounts of benzene and acetone to yield 350 mg of 4,5,6-triiodo-1,2,3,3-tetramethyl-3H-indolium iodide. 1H-NMR (200 MHz, DMSO-d6), δ, ppm: 8.53 (1H, s, arom.), 3.93 (3H, s, NCH3), 2.77 (3H, s, CH3), 1.60 (6H, s, C(CH3)2).

Provenance & Evidence