Chloroform → HCID 22256668, compound

Participants

Reaction Steps

A mixture of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-iodothieno[3,2-b]pyridine-6-carbonitrile (500 mg, 1.05 mmol), (trimethylsilyl)acetylene (237 μL, 1.67 mmol), 12.5 mg of tetrakis(triphenylphosphine)palladium(0) and 5 mg of copper(I) iodide in 3.5 mL of triethylamine and 12 mL of benzene is heated at reflux for 20 hours. The mixture is cooled to room temperature and 50 mL of chloroform are added. The mixture is washed with saturated aqueous sodium chloride, dried over sodium sulfate, filtered through a celite pad and concentrated in vacuo. The resulting brown solid is suspended in diethyl ether. The solids are collected by filtration and washed with diethyl ether to yield 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-[(trimethylsilyl)ethynyl]thieno[3,2-b]pyridine-6-carbonitrile as yellow crystals, mp 169–171° C.; 1H NMR (CDCl3) δ 0.26 (s, 9H), 3.88 (s, 3H), 6.79 (s, 1H), 6.89 (s, 1H), 7.51 (s, 1H), 7.56 (s, 1H), 8.65 (s, 1H); MS 444.1, 446.1 (M−H)−.

Provenance & Evidence