Tetrahydrofuran → HCID 22757269, Verbindung
Reaktionsgleichung
[CH2:1]([C:3]1([CH2:16][C:17]([OH:19])=[O:18])[C:15]2[NH:14][C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[C:7]=2[CH2:6][CH2:5][CH2:4]1)[CH3:2].[H-].[Na+].O1CCC[CH2:23]1>>[CH2:1]([C:3]1([CH2:16][C:17]([OH:19])=[O:18])[C:15]2[N:14]([CH3:23])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[C:7]=2[CH2:6][CH2:5][CH2:4]1)[CH3:2]Komponenten
4
Reaktionsbedingungen
- Temperatur
- 40 °C
Versuchsvorschrift
A solution of the compound of formula 5, 1-ethyl 1,2,3,4-tetrahydrocarbazole-1-acetic acid (2.0 g, 7.4 mmole), described in Example 56, in dry tetrahydrofuran (THF, 50 ml) is added dropwise under nitrogen to a stirred suspension of sodium hydride (1 g, 50% dispersion, 0.02 mole) in dry-THF (25 ml). The reaction mixture is stirred for 15 minutes after the end of the addition. The lower alkyl halide, methyliodide (1.5 ml), is added dropwise. The reaction mixture is heated initially to 40° C. then stirred for one hour at room temperature. A small amount of water is added cautiously to destroy excess sodium hydride followed by the addition of more water (50 ml). The mixture is washed with ether then rendered acidic and extracted with ether. The ether extract is dried (MgSO4), treated with charcoal and filtered through diatomaceous earth. Evaporation of the ether gives an oil which on recrystallization from benzene affords the title compound, mp 140°-143° C., nmr (CDCl3) δ 0.72 (t, J = 7, 3H), 1.9 (m, 6H), 2.75 (m, 4H), 3.76 (s, 3H), 7.2 (m, 4H).