Sodium Hydroxide → 5-Fluoro-3-piperazino benzofuran
Reaktionsgleichung
C(OC([N:6]1[CH2:11][CH2:10][N:9]([C:12]2[C:16]3[CH:17]=[C:18]([F:21])[CH:19]=[CH:20][C:15]=3[O:14][CH:13]=2)[CH2:8][CH2:7]1)=O)C.[OH-].[Na+]>C(O)C>[F:21][C:18]1[CH:19]=[CH:20][C:15]2[O:14][CH:13]=[C:12]([N:9]3[CH2:8][CH2:7][NH:6][CH2:11][CH2:10]3)[C:16]=2[CH:17]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
4-(5-fluorobenzofuran-3-yl)-piperazine-1-carboxylic acid ethyl ester (Step 1, 3 g) was dissolved in 95% ethanol and 3N aqueous sodium hydroxide (25 mL) was added. The reaction mixture was stirred at reflux for 24 hours. The mixture was then cooled to room temperature, concentrated on a rotary evaporator to remove the ethanol and extracted with chloroform. The combined organic layers were washed with brine, dried over anhydrous MgSO4, filtered and concentrated on a rotary evaporator. The desired product (0.8 g) was obtained as a brown oil and was used without further purification; MS (ES) m/z (relative intensity): 221 (M+H)+ (100).