Nitric Acid → HCID 22737748, compound

Participants

Reaction Conditions

Reaction Steps

Into a 2 liter Erlenmeyer flask equipped with magnetic stirring was charged dodecylamine (185.0 grams, 1.0 mol; obtained from Sigma-Aldrich) followed with ethyl cyanoacetate (ECA, 135.5 grams, 1.20 mol; obtained from Sigma-Aldrich). The mixture was then heated to 140° C. and stirred at this temperature for 1 hour, during which time the ethanol by-product was allowed to distill away. Thereafter, to the hot reaction mixture stirring at 140° C. internal temperature was sequentially added dimethylformamide (DMF; 250 milliliters), ethyl acetoacetate (EAA; 266.0 grams, 2.0 mol; obtained from Sigma-Aldrich), and piperazine (PIP; 129.0 grams, 1.5 mol; obtained from Sigma-Aldrich). The mixture was then heated to 110° C. for 4 hours. The mixture was then allowed to cool to room temperature and was poured slowly into a mixture of deionized water (1,500 milliliters), methanol (3,500 milliliters), and concentrated nitric acid (270.0 grams, 3.0 mol). A white precipitate formed immediately and was allowed to stir at room temperature for 3 hours, and then was filtered and washed with a 70:30 (v/v) mixture of methanol/deionized water (500 milliliters). The precipitate was then oven dried at 60° C. to give 270.5 grams of an off white solid at 85 percent yield.

Provenance & Evidence