Nicotinic Acid → 5-Nitro-2-(pyridin-3-yl)-1,3-benzothiazole

Beteiligte Stoffe

Reaktionsschritte

2-Amino-4-nitrobenzenethiol,17 g, 0.10 mole, and nicotinic acid, 18.7 g, 0.15 mole, are heated 2 hours at reflux in 250 cc of CHCl3 containing 100 g of PPE. The solution is concentrated in vacuo, and the residue slurried in H2O. The pH is adjusted to 11 with 50% NaOH solution. The precipitate is filtered, washed with H2O and dried in vacuo to yield 11.2 g of tan solid m.p. 196°-198°, 44% of theory.

Herkunft & Nachweise