3-Bromoaniline → 8-(3-Bromo-phenylamino)imidazo[4,5-g]quinoline-7-carbonitrile

Participants

Reaction Steps

A mixture of 0.2 g (0.87 mmol) of 8-chloroimidazo[4,5-g]quinoline-7-carbonitrile, 0.12 mL (1.1 mmol) of 3-bromoaniline, and 0.1 g (0.87 mmol) of pyridine hydrochloride in 5.0 mL of 2-ethoxyethanol is heated at reflux temperature for 45 minutes, then cooled to room temperature. The product mixture is poured into a saturated solution of sodium bicarbonate and stirred for 0.5 hour. The solid is collected by filtration, washed with water and dried. The solid is purified by silica gel chromatography, utilizing a gradient of methylene chloride/methanol(98:2 to 93:7) to yield 0.20 g of 8-(3-bromo-phenylamino)imidazo[4,5-g]quinoline-7-carbonitrile as pink solid, mp 286-288° C.

Provenance & Evidence