p-Toluenesulfonic acid → HCID 86736997, compound

Participants

Reaction Steps

With stirring, reflux a mixture containing 5 g. of 2-chloronicotinic acid, 0.3 g. of p-toluene sulfonic acid, 12.5 g. of 2-methyl-3-difluoromethyl aniline, and 15 ml. of n-propanol for five hours. Treat the reaction mixture with ether and 6.2 g. of potassium hydroxide dissolved in 100 ml. of water. Separate and acidify the aqueous layer with dilute hydrochloric acid to yield the product 2-(2-methyl-3-difluoromethylanilino) nicotinic acid, m.p. 232°-234° after recrystallization from acetonitrile.

Provenance & Evidence