Potassium Carbonate → HCID 58911267, Verbindung
Reaktionsgleichung
Br[CH2:2][CH2:3][CH2:4][C:5]([NH:7][C:8]1([N:11]2[CH:15]=[CH:14][N:13]=[CH:12]2)[CH2:10][CH2:9]1)=[O:6].C([O-])([O-])=O.[K+].[K+]>CN(C=O)C>[N:11]1([C:8]2([N:7]3[CH2:2][CH2:3][CH2:4][C:5]3=[O:6])[CH2:10][CH2:9]2)[CH:15]=[CH:14][N:13]=[CH:12]1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
In a 50 ml three necked flask fitted with a magnetic stirrer, under inert atmosphere, the crude 4-bromo-N-(l-imidazol-1-yl-cyclopropyl)-butyramide a18 (2.76 g), K2CO3 (1.26 g, 9.1 mmol) and KI (0.0075 g) in DMF (25 ml) are heated 3 h at 60° C., 17 h at 80° C., cooled down to room temperature and concentrated in vacuo. The reaction mixture is diluted with CH2Cl2, filtered and concentrated in vacuo to give the crude pyrrolidone (1.7 g). The residue is purified by chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 95/4.5/05 (v/v/v)) to give, after treatment with HCl in ether (1 eq) and recrystallization in MeCN, 1-[l-(1H-imidazol-1-yl)cyclopropyl]pyrrolidin-2-one 23 (0.033 g, 7.5%) as an hydrochloride.