Iodine → HCID 178506566, Verbindung
Reaktionsgleichung
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=[N:2]1.[I:10]I.[OH-].[K+]>CN(C=O)C>[I:10][C:3]1[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[NH:1][N:2]=1Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
In a 50 mL round-bottomed flask, indazole (0.80 g, 6.8 mmol) was dissolved in DMF (14 mL). Iodine (3.4 g, 13.5 mmol) was added followed by potassium hydroxide (1.47 g, 26.2 mmol). The dark reaction mixture was stirred at room temperature for 1.25 h then was quenched with 10% aq NaHSO3 and extracted with diethyl ether (2×). The combined organic layers were washed with water and brine then dried over sodium sulfate, filtered and concentrated to give 1.65 g (95%) of 3-iodo-1H-indazole as a light yellow solid. 1H NMR (CDCl3, 300 MHz): δ (ppm) 10.56 (br. s, 1H), 7.47-7.57 (m, 3H), 7.23-7.30 (m, 1H).