Triethylamine → HCID 9958451, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-[1-(3,4-dimethoxyphenyl)-3-oxobutyl]-4-aminoisoindoline-1,3-dione (1.02 g, 2.77 mmol) and triethylamine (1.40 g, 13.85 mmol) in methylene chloride (40 mL) was cooled to 5° C. Methanesulfonyl chloride (1.27 g, 11.08 mmol) was added at 5-8° C. and the resulting mixture was stirred at room temperature for 2 hours. The mixture was washed with sat. Sodium bicarbonate (20 mL), 1N hydrogen chloride (20 mL), water (30 mL), brine (30 mL) and dried over magnesium sulfate. The solvent was removed in vacuo and the residue was purified by chromatography (Silica gel, methylene chloride:ethyl acetate 9:1) to give 2-[1-(3,4-dimethoxyphenyl)-3-oxobutyl]-4-[bis(methylsulfonyl)amino]isoindoline-1,3-dione (1.18 g, 81%) as a white solid: mp 194-196° C.; 1H NMR (DMSO-d6) δ 8.02-7.93 (m, 3H), 6.99-6.90 (m, 3H), 5.65 (t, J=6.7 Hz, 1H), 3.75-3.65 (m, 1H), 3.71 (s, 6H), 3.56 (s, 6H), 3.53-3.46 (m, 1H), 2.11 (s, 3H); 13C NMR (DMSO-d6) δ 205.79, 166.58, 165.78, 148.64, 148.32, 138.48, 135.86, 132.68, 131.50, 129.85, 129.15, 125.06, 119.35, 111.58, 110.91, 55.49, 55.39, 49.27, 44.52, 43.53, 43.49, 29.92; Anal. Calcd. for C22H24N2O9S2: C, 50.37; H, 4.61; N, 5.34, S, 12.23. Found: C, 50.43, H, 4.77; N, 5.16; S, 12.22.

Provenance & Evidence