(+-)-Methionine → HCID 178515872, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a round-bottomed flask was added D,L-methionine (1.19 g, 7.96 mmol), 3-(4-methoxyphenyl)-pyrazole (990 mg, 5.68 mmol), and methanesulfonic acid (23 ml). The resulting solution was heated to about 50° C. for about forty-eight hours, and was then allowed to cool to room temperature and poured into water. The pH of the solution was adjusted to about 7 with 5 N sodium hydroxide, and was then extracted with ethyl acetate. The organic extracts were dried over magnesium sulfate, filtered, and concentrated in vacuo to afford 950 mg of a white solid which was determined to be about 95% pure by NMR. This material was subsequently employed directly without further purification.

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