Hydrazine hydrate (1:1) → HCID 86629527, compound

Participants

Reaction Steps

To a solution of 1-{1-[3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propyl]-piperidin-4-yl}-3-methoxy-1-thiophen-3-ylmethyl-urea (0.69 g, 1.56 mmol) in EtOH (15 ml) was added hydrazine hydrate (0.49 ml, 15.6 mmol) and the reaction was stirred at rt for 16 h. The reaction mixture was diluted with Et2O (40 ml) to give a white precipitate. The solid was removed via suction filtration and the filtrate was concentrated in vacuo to give a white foam. Purification by column chromatography on silica gel (CH2Cl2:MeOH:NH4OH, 83:15:2, v/v/v) gave 1-[1-(3-amino-propyl)-piperidin-4-yl]-3-methoxy-1-thiophen-3-ylmethyl-urea as a white foam (0.280 g, 57%). 1H NMR (CDCl3) δ 1.60-1.72 (m, 6H), 2.00 (t, 2H, J=9.0 Hz), 2.07 (br s, 3H), 2.39 (t, 2H, J=6.0 Hz), 2.75 (t, 2H, J=6.0 Hz), 2.98 (d, 2H, J=12.0 Hz), 3.65 (s, 3H), 4.25 (m, 1H), 4.29 (s, 2H), 6.95 (d, 1H, J=3.0 Hz), 7.10 (s, 2H), 7.34 (m, 1H).

Provenance & Evidence