Methanol → N-[2-(2,6-Dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl]-3-nitro-benzamide

HRID 906750

Reaction equation

HRID 906750 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].[N+:21]([C:24]1[CH:25]=[C:26]([CH:30]=[CH:31][CH:32]=1)[C:27](Cl)=[O:28])([O-:23])=[O:22].CO>C1COCC1.C(OCC)C>[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:27](=[O:28])[C:26]3[CH:30]=[CH:31][CH:32]=[C:24]([N+:21]([O-:23])=[O:22])[CH:25]=3)[C:6]2=[O:11])[CH2:17][CH2:16][C:15](=[O:18])[NH:14]1

Participants

6

Reactant 3

HCID 887MethanolHCID 8495Benzoyl chloride, 3-nitro-HCID 134780Pomalidomide

Product 1

HCID 10112967N-[2-(2,6-Dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl]-3-nitro-benzamideYield 95%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a suspension of 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (1.10 g, 4 mmol) in THF (30 ml) was added 3-nitrobenzoyl chloride 1.48 g, 8 mmol). The mixture was heated to reflux for 18 hours. The reaction was cooled to room temperature, methanol (2 ml) was added, and the mixture stirred for 1 hour. The solvent was evaporated in vacuo leaving a solid that was slurried in diethyl ether (30 ml) and filtered to give 1.60 g (95%) of product as an off-white solid: mp 245-247° C.; 1H NMR (DMSO-d6) d 10.85 (s, 1H), 10.53 (s, 1H), 8.76 (s, 1H), 8.50-8.37 (m, 3H), 7.95-7.87 (m, 2H), 7.70 (d, J=7.4 Hz, 1H), 5.14 (dd, J=5.7 and 12.7 Hz, 1H), 3.02-2.83 (m, 1H), 2.67-2.47 (m, 2H), 2.15-2.07 (m, 1H); 13C NMR (DMSO-d6) d 171.73, 168.79, 167.19, 166.04, 162.85, 147.84, 135.60, 134.79, 132.92, 131.21, 130.19, 126.87, 126.20, 121.69, 118.83, 48.86, 30.51, 21.63; Anal. Calcd. For C20H14N4O7: C, 56.88; H, 3.34; N, 13.27. Found: C, 56.87; H, 3.33; N, 13.05.

Workup

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

Sources & evidence

ORD record
ord-0faca4e62c604282aca220aa377c80f5
Source dataset
uspto-grants-2011_09
Patent number
US08012997B2

Linked notes

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