Acetic Acid → 6-Methyl-5-(m-trifluoromethylbenzylmercapto)-pyridine-2-carboxylic acid methyl ester

Beteiligte Stoffe

Reaktionsschritte

To the stirred suspension of 1.08 g of sodium hydride in 25 ml of dimethylformamide the solution of 9.0 g of m-trifluoromethylbenzylmercaptan in 50 ml of dimethylformamide is added during 3 minutes and the mixture stirred for 10 minutes. It is combined with 7.75 g of 6-methyl-5-nitropyridine-2-carboxylic acid methyl ester and the whole stirred on the steam bath for 30 minutes and allowed to stand overnight at room temperature. 2 ml of acetic acid are added and the solution is mixed with ice water to produce a dense, grainy precipitate. It is filtered off and recrystallized from isopropanol-diethyl ether, to yield the 6-methyl-5-(m-trifluoromethylbenzylmercapto)-pyridine-2-carboxylic acid methyl ester melting at 91°-93°.

Herkunft & Nachweise