Methyl chloroglyoxylate → Methyl 2-[[2-(2,6-dioxo-3-piperidyl)-1,3-dioxo-isoindolin-4-yl]amino]-2-oxo-acetate

HRID 9982

Reaction equation

HRID 9982 reaction equation
[NH2:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[C:4](=[O:20])[N:5]([CH:12]1[CH2:17][CH2:16][C:15](=[O:18])[NH:14][C:13]1=[O:19])[C:6]2=[O:11].Cl[C:22]([C:24]([O:26][CH3:27])=[O:25])=[O:23]>C1COCC1>[O:19]=[C:13]1[CH:12]([N:5]2[C:4](=[O:20])[C:3]3[C:7](=[CH:8][CH:9]=[CH:10][C:2]=3[NH:1][C:22]([C:24]([O:26][CH3:27])=[O:25])=[O:23])[C:6]2=[O:11])[CH2:17][CH2:16][C:15](=[O:18])[NH:14]1

Participants

4

Reactant 2

HCID 79846Methyl chloroglyoxylateHCID 134780Pomalidomide

Product 1

HCID 10155361Methyl 2-[[2-(2,6-dioxo-3-piperidyl)-1,3-dioxo-isoindolin-4-yl]amino]-2-oxo-acetateYield 76.5%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a stirred suspension of 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (0.55 g, 2.0 mmol) in THF (30 ml) was added methyl (chlorocarbonyl)formate (0.49 g, 4.0 mmol). The mixture was heated to reflux for 18 hours. The solvent was evaporated in vacuo and the resulting solid was slurried in diethyl ether (20 ml) and filtered to give 0.55 g (76%) of product as an off-white solid: mp 247–249° C.; 1H NMR (DMSO-d6) δ 11.17 (s, 1H), 10.81 (s, 1H), 8.59 (d, J=8.3 Hz, 1H), 7.92 (t, J=7.7 Hz, 1H), 7.70 (d, J=7.3 Hz, 1H), 5.19 (dd, J=5.0 and 12.5 Hz, 1H), 3.91 (s, 3H), 2.98–2.85 (m, 1H), 2.68–2.50 (m, 2H), 2.14–2.09 (m, 1H); 13C NMR (DMSO-d6) δ 172.70, 169.63, 168.03, 166.45, 159.81, 154.57, 136.65, 134.93, 131.36, 124.67, 119.34, 117.17, 53.80, 49.06, 30.92, 21.94; Anal. Calcd. For C18H13N3O7: C, 53.49; H, 3.65; N, 11.70. Found: C, 53.53; H, 3.66; N, 11.52.

Workup

  1. temperatureThe mixture was heated
  2. temperatureto reflux for 18 hours
  3. customThe solvent was evaporated in vacuo
  4. filtrationfiltered

Sources & evidence

ORD record
ord-bfb278c2801e4c8a8008f8823ebf19cd
Source dataset
uspto-grants-2006_08
Patent number
US07091353B2

Linked notes

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