Lithium hydroxide, monohydrate → HCID 68276429, compound

Participants

Reaction Conditions

Reaction Steps

3.08 g (2 eq) of lithium hydroxide monohydrate is added at room temperature to a solution of 8.7 g (36.7 mmol) of ethyl 2-amino-5-cyano-6-(methylthio)nicotinate in 87 ml of ethanol and 87 ml of water. The reaction mixture is stirred at 60° C. for 2 hours. The ethanol is evaporated and 1 N aqueous soda is added. The aqueous phase is washed with ethyl acetate and then re-acidified by adding 1 N aqueous hydrogen chloride (pH=1). The precipitate formed is filtered, rinsed with water and with diethyl ether and then dried under vacuum to yield 7.67 g (quantitative) of 2-amino-5-cyano-6-(methylthio)nicotinic acid in the form of a brown powder.

Provenance & Evidence