Propionyl chloride → N-[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]propanamide

HRID 2103489Notes

Reaction equation

HRID 2103489 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].[C:21](Cl)(=[O:24])[CH2:22][CH3:23]>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:21](=[O:24])[CH2:22][CH3:23])[C:6]2=[O:11])[CH2:17][CH2:16][C:15](=[O:18])[NH:14]1

Participants

4

Reactant 2

HCID 62324Propionyl chlorideHCID 134780Pomalidomide

Product 1

HCID 9902003N-[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]propanamide

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 propanoyl chloride (0.37 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 0.58 g (88. %) of product as an off-white solid: mp 221-223° C.; 1H NMR (DMSO-d6) δ 11.15 (s, 1H), 9.65 (s, 1H), 8.50 (d, J=8.3 Hz, 1H), 7.83 (t, J=7.6 Hz, 1H), 7.60 (d, J=7.2 Hz, 1H), 5.16 (dd, J=5.2 and 12.6 Hz, 1H), 2.99-2.85 (m, 1H), 2.66-2.45 (m, 4H), 2.11-2.07 (m, 1H), 1.14 (t, J=7.5 Hz, 3H); 13C NMR (DMSO-d6) δ 172.69, 172.65, 169.71, 167.79, 166.62, 136.65, 136.09, 131.35, 125.93, 118.12, 116.66, 48.91, 30.91, 29.73, 21.97, 9.13; Anal. Calcd. For C16H15N3O5: C, 58.36; H, 4.59; N, 12.76. Found: C, 58.01; H, 4.45; N, 12.61.

Workup

  1. temperatureThe mixture was heated
  2. temperatureto reflux for 18 hours
  3. customThe solvent was evaporated in vacuo
  4. filtrationfiltered
  5. customto give 0.58 g (88. %) of product as an off-white solid

Sources & evidence

ORD record
ord-ced4e39c1bf748cc807c160652f848b6
Source dataset
uspto-grants-2009_08
Patent number
US07576104B2

Reaction notes

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