反应详情

5-Chloro-3-nitro-2-(trifluoroacetamido)pyridine (2.7 grams), anhydrous stannous chloride (3.8 grams), and 4.0 milliliters of concentrated hydrochloric acid were mixed in 20 milliliters of acetic acid. The mixture was cooled to temperatures of 0°-10° C. and maintained thereat for 15 minutes. Water (50 milliliters) was then added to the reaction mixture, and the desired 6-chloro-1-hydroxy-2-(trifluoromethyl)imidazo(4,5-b)pyridine product precipitated. It was separated and dried. The yield was 1.3 grams, 55 percent. The product so obtained melted at 264°-66° C.

1. temperatureThe mixture was cooled to temperatures of 0°-10° C.
2. temperaturemaintained
3. customthe desired 6-chloro-1-hydroxy-2-(trifluoromethyl)imidazo(4,5-b)pyridine product precipitated
4. customIt was separated
5. customdried