Isobutyryl chloride → HCID 9946801, compound

HRID 2103533Notes

Reaction equation

HRID 2103533 reaction equation
N12CCCN=C1CCCCC2.Cl.[NH2:13][CH2:14][C:15]1[CH:23]=[CH:22][CH:21]=[C:20]2[C:16]=1[C:17](=[O:33])[N:18]([CH:25]1[CH2:30][CH2:29][C:28](=[O:31])[NH:27][C:26]1=[O:32])[C:19]2=[O:24].[C:34](Cl)(=[O:38])[CH:35]([CH3:37])[CH3:36]>CC#N>[O:32]=[C:26]1[CH:25]([N:18]2[C:17](=[O:33])[C:16]3[C:20](=[CH:21][CH:22]=[CH:23][C:15]=3[CH2:14][NH:13][C:34](=[O:38])[CH:35]([CH3:37])[CH3:36])[C:19]2=[O:24])[CH2:30][CH2:29][C:28](=[O:31])[NH:27]1

Participants

5

Reactant 3

HCID 62325Isobutyryl chlorideHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 219885254-(aminomethyl)-2-(2,6-dioxopiperidin-3-yl)-2,3-dihydro-1H-isoindole-1,3-dione hydrochloride

Product 1

HCID 9946801HCID 9946801, compoundYield 73%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

1,8-Diazabicyclo[5,4,0]undec-7-ene (0.62 g, 4.08 mmol) was added to a stirred suspension of 4-(aminomethyl)-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione hydrochloride (0.60 g, 1.85 mmol) in CH3CN (50 mL). After stirring for 20 min, isobutyryl chloride (0.24 g, 2.22 mmol) was added. The mixture was stirred at room temperature for 17 hours. The solvent was removed in vacuo and the residue was dissolved in CH2Cl2 (70 mL). The CH2Cl2 solution was washed with 1N HCl (30 mL), H2O (30 mL), brine (30 mL) and dried (MgSO4). The solvent was removed in vacuo and the solid was purified from ether (10 mL) and hexane (10 mL) to give N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}-2-methylpropanamide (0.48 g, 73%) as a white solid: mp 218-220° C.; 1H NMR (DMSO-d6) δ 11.13 (s, 1H), 8.39 (t, J=5.8 Hz, 1H), 7.87-7.78 (m, 2H), 7.66-7.63 (m, 1H), 5.19-5.12 (dd, J=6.9 and 12.5 Hz, 1H), 4.71 (d, J=5.8 Hz, 2H), 2.97-2.83 (m, 1H), 2.63-2.43 (m, 3H), 2.08-2.04 (m, 1H), 1.07 (d, J=6.9 Hz, 6H); 13C NMR (DMSO-d6) δ 176.52, 172.75, 169.82, 167.49, 166.95, 139.54, 134.77, 132.85, 131.50, 127.02, 121.77, 48.83, 37.48, 33.98, 30.92, 21.96, 19.53; Anal. Calcd. For C18H19N3O5: C, 60.50; H, 5.36; N, 11.76. Found: C, 60.48; H, 5.33; N, 11.64.

Workup

  1. stirringThe mixture was stirred at room temperature for 17 hours
  2. customThe solvent was removed in vacuo
  3. dissolutionthe residue was dissolved in CH2Cl2 (70 mL)
  4. washThe CH2Cl2 solution was washed with 1N HCl (30 mL), H2O (30 mL), brine (30 mL)
  5. dry with materialdried (MgSO4)
  6. customThe solvent was removed in vacuo
  7. customthe solid was purified from ether (10 mL) and hexane (10 mL)

Sources & evidence

ORD record
ord-0871fb32a44e4fdf983b2892b4de80f4
Source dataset
uspto-grants-2009_08
Patent number
US07576104B2

Reaction notes

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