Potassium Carbonate → 1-(2-Hydroxyethyl)-4-(2-fluorophenyl)piperazine

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[N:8]1[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]1.I[CH2:15][CH2:16][OH:17].C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[OH:17][CH2:16][CH2:15][N:11]1[CH2:12][CH2:13][N:8]([C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=2[F:1])[CH2:9][CH2:10]1

Participants

Procedure

A mixture of 1-(2-fluorophenyl)piperazine (0.50 g), 2-iodoethanol (0.48 g), and potassium carbonate (1.5 g) in dimethylformamide (7 mL) was heated at reflux for three hours. The solvent was removed in vacuo and the residue was purified by preparative thin-layer chomatography (silica gel, eluting with chloroform/methanol, 9:1), giving the title compound as a yellow oil (0.41 g, 65%). 1H NMR (300 MHz, CDCl3) δ7.09-6.90 (m, 4H), 3.67 (t, 2H, J=5.4 Hz), 3.13 (t, 4H, J=4.7 Hz), 2.76 (br s, 1H), 2.71 (t, 4H, J=4.8 Hz), 2.63 (t, 4H, J=5.4 Hz). 13C NMR (75 MHz, CDCl3) δ156.3 (d, J=244.1 Hz), 140.6 (d, J=8.8 Hz), 125.1 (d, J=3.4 Hz), 123.2 (d, J=8.1 Hz), 119.5 (d, J=2.9 Hz), 116.7 (d, J=20.6 Hz), 60.1, 58.4, 53.6 (2C), 51.2 (d, 2C, J=3.0 Hz).