Ethylene Glycol → 4-(8-Benzyl-2,8-diaza-spiro[5.5]undec-2-yl)-2-methyl-6-nitro-phenylamine

Participants

Reaction Conditions

Reaction Steps

A suspension of 4-iodo-2-methyl-6-nitroaniline (1.39 g, 5 mmol), 2-benzyl-2,8-diaza-spiro[5.5]undecane (1.22 g, 5 mmol), CuI (190.5 mg, 1.0 mmol), ethylene glycol (931 mg, 15 mmol) and K3PO4 (3.2 g, 15 mmol) in isopropanol (40 mL) was sealed and heated at 90° C. for 19 h. After cooled down to room temperature, the reaction mixture was concentrated. The residue was purified by chromatography (99:1 CH2Cl2/MeOH) to afford the title compound (593 mg, 30%). 1H NMR (CDCl3) δ 1.24 (m, 2H), 1.48-1.68 (6H), 2.01-2.24 (m, 2H), 2.24 (s, 3H), 2.57 (m, 2H), 2.73 (d, J=12 Hz, 1H), 2.82 (m, 1H), 3.03 (m, 1H), 3.14 (d, J=12 Hz, 1H), 3.47 (d, J=9 Hz, 2H), 5.30 (br s, 2H NH), 7.11 (s, 1H), 7.19-7.33 (5H), 7.44 (s, 1H). ESI-MS m/z 395 (MH+).

Provenance & Evidence