Triethylamine → 1-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3 dihydro-1H-isoindol-4-ylmethyl]-3-(3-methoxy-phenyl)-urea

HRID 448419Notes

Reaction equation

HRID 448419 reaction equation
Cl.[NH2:2][CH2:3][C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[C:6](=[O:22])[N:7]([CH:14]1[CH2:19][CH2:18][C:17](=[O:20])[NH:16][C:15]1=[O:21])[C:8]2=[O:13].C(N(CC)CC)C.[CH3:30][O:31][C:32]1[CH:33]=[C:34]([N:38]=[C:39]=[O:40])[CH:35]=[CH:36][CH:37]=1>C1COCC1>[O:21]=[C:15]1[CH:14]([N:7]2[C:6](=[O:22])[C:5]3[C:9](=[CH:10][CH:11]=[CH:12][C:4]=3[CH2:3][NH:2][C:39]([NH:38][C:34]3[CH:35]=[CH:36][CH:37]=[C:32]([O:31][CH3:30])[CH:33]=3)=[O:40])[C:8]2=[O:13])[CH2:19][CH2:18][C:17](=[O:20])[NH:16]1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 878433-Methoxyphenyl isocyanateHCID 219885254-(aminomethyl)-2-(2,6-dioxopiperidin-3-yl)-2,3-dihydro-1H-isoindole-1,3-dione hydrochloride

Product 1

HCID 583072151-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3 dihydro-1H-isoindol-4-ylmethyl]-3-(3-methoxy-phenyl)-ureaYield 80.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
5 °C

Procedure

A suspension of 4-aminomethyl-2-(2,6-dioxo-piperidin-3-yl)-isoindole-1,3-dione hydrochloride (0.7 g, 2.0 mmol) and triethylamine (0.3 g, 2.6 mmol) in THF (30 mL) was cooled to 5° C. 3-Methoxyphenyl isocyanate (0.4 g, 2.6 mmol) was added, and the mixture was stirred at room temperature 5 hours. The mixture was concentrated, and the residue was dissolved in CH2Cl2 (80 mL). The CH2Cl2 solution was washed with 1N HCl (40 mL), water (40 mL), and brine (40 mL), and dried (MgSO4). Solvent was removed, and the solid was slurried with ethanol (20 mL) to give 1-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3 dihydro-1H-isoindol-4-ylmethyl]-3-(3-methoxy-phenyl)-urea (0.7 g, 80%) as a white solid: mp 160-162° C.; 1H NMR (DMSO-d6) δ 2.06-2.10 (m, 1H), 2.50-2.65 (m, 2H), 2.85-2.99 (m, 1H), 3.69 (s, 3H, OCH3), 4.69 (d, J=5.2 Hz, 2H, CH2), 5.14-5.20 (dd, J=4.6 and 12.1 Hz, 1H, CH), 6.49 (d, J=7.9 Hz, 1H, Ar), 6.76-6.86 (m, 2H, Ar), 7.08-7.14 (m, 2H), 7.76-7.85 (m, 3H, Ar), 8.81 (s, 1H, NH), 11.16 (s, 1H, NH); 13C NMR (DMSO-d6) δ 21.99, 30.94, 38.72, 48.87, 54.82, 103.44, 106.70, 110.05, 121.86, 127.19, 129.36, 131.61, 133.62, 134.72, 140.23, 141.51, 155.15, 159.62, 167.01, 167.60, 169.82, 172.76; Anal. calcd. for C22H20N4O6: C, 60.55; H, 4.62; N, 12.84. Found: C, 60.18; H, 4.42; N, 12.63.

Workup

  1. concentrationThe mixture was concentrated
  2. dissolutionthe residue was dissolved in CH2Cl2 (80 mL)
  3. washThe CH2Cl2 solution was washed with 1N HCl (40 mL), water (40 mL), and brine (40 mL)
  4. dry with materialdried (MgSO4)
  5. customSolvent was removed

Sources & evidence

ORD record
ord-47825c5987ec44b5a3f692ad041db458
Source dataset
uspto-grants-2013_07
Patent number
US08481568B2

Reaction notes

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