Hydrochloric Acid → HCID 178512483, Verbindung

Beteiligte Stoffe

Reaktionsschritte

3.70 g (19.14 mmol) of the oily methyl ester of 3-(4-aminomethylphenyl)propionic acid was dissolved in 150 ml of tetrahydrofuran. To the solution were added 5.80 g (28.71 mmol) of 1-amidino-3,5-dimethylpyrazole nitrate and 4.70 g (36.37 mmol) of N,N-diisopropylethylamine, and the mixture was heated overnight under reflux. The reaction mixture was concentrated under vacuum to give an oil. This oil was reacted with 70 ml of 5% HCl for 3 hours under reflux. The reaction mixture was passed through a filter and the filtrate was ice-cooled. The pH of the filtrate was adjusted to 6.4 by addition of 10% aqueous NaOH. The so adjusted filtrate was stirred for 30 minutes under ice-cooling. The precipitating crystal was recovered by filtration and washed successively with distilled water and tetrahydrofuran. Upon drying, 2.85 g of a pale yellow crystal was obtained (yield: 67.4%). m.p.≥300° C.

Herkunft & Nachweise