Reaktion #11695

Reaktionsgleichung

(S)—N-t-butyloxycarbonyl(2-aminomethylphenyl)alanine

N,N-dimethylformamide

1-hydroxy-7-azabenzotriazole

1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride

→

(S)-4-(t-butyloxycarbonylamino)-2,3,4,5-tetrahydro-2-benzazepin-3(1H)-one

Lösungsmittel

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe solvent was removed under vacuum
2. 2
   workup.DISSOLUTIONthe residue was dissolved ethyl acetate (100 mL)
3. 3
   WaschenThis solution was washed sequentially with 1.0 M aqueous hydrochloric acid (50 mL twice), 1.0 M aqueous sodium hydroxide (50 mL), water (50 mL), and brine (50 mL)
4. 4
   Trocknendried over anhydrous sodium sulfate
5. 5
   Sonstigeevaporated under vacuum

Vorschrift

A mixture of (S)—N-t-butyloxycarbonyl(2-aminomethylphenyl)alanine (353 mg), N,N-dimethylformamide (10 mL), dichloromethane (50 mL), 1-hydroxy-7-azabenzotriazole (252 mg), and 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (180 mg) was stirred at room temperature for 1 h. The solvent was removed under vacuum and the residue was dissolved ethyl acetate (100 mL). This solution was washed sequentially with 1.0 M aqueous hydrochloric acid (50 mL twice), 1.0 M aqueous sodium hydroxide (50 mL), water (50 mL), and brine (50 mL), dried over anhydrous sodium sulfate, and evaporated under vacuum to obtain (S)-4-(t-butyloxycarbonylamino)-2,3,4,5-tetrahydro-2-benzazepin-3(1H)-one (315 mg).

Quelle