Butyl isocyanate → n-{[2-(2,6-Dioxo(3-piperidyl))1,3-dioxoisoindolin-4-yl]methyl}(butylamino)carboxamide

HRID 906774Notes

Reaction equation

HRID 906774 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].[CH2:34]([N:38]=[C:39]=[O:40])[CH2:35][CH2:36][CH3:37]>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:39]([NH:38][CH2:34][CH2:35][CH2:36][CH3:37])=[O:40])[C:19]2=[O:24])[CH2:30][CH2:29][C:28](=[O:31])[NH:27]1

Participants

5

Reactant 3

HCID 8110Butyl isocyanateHCID 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 21988581n-{[2-(2,6-Dioxo(3-piperidyl))1,3-dioxoisoindolin-4-yl]methyl}(butylamino)carboxamideYield 61.6%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

1,8-Diazabicyclo[5,4,0]undec-7-ene (0.29 g, 1.90 mmol) was added to a stirred suspension of 4-(aminomethyl)-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione hydrochloride (0.6 g, 1.85 mmol) in CH3CN (50 mL). After stirring for 20 min n-butyl isocyanate (0.27 g, 2.77 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 residue was purified by chromatography (SiO2, CH2Cl2: EtOAc 1:1) to give N-{[2-(2,6-dioxo(3-piperidyl))1,3-dioxoisoindolin-4-yl]methyl}(butylamino)carboxamide (0.44 g, 61%) as a white solid: mp 172-174° C.; 1H NMR (DMSO-d6) δ 11.13 (s, 1H), 7.86-7.68 (m, 3H), 6.42 (t, J=5.9 Hz, 1H), 6.12 (t, J=5.4 Hz, 1H), 5.18-5.11 (dd, J=5.2 and 12.4 Hz, 1H), 4.63 (d, J=5.9 Hz, 1H), 3.03-2.83 (m, 3H), 2.64-2.51 (m, 2H), 2.08-2.04 (m, 1H), 1.37-1.22 (m, 4H), 0.86 (t, J=7.0 Hz, 3H); 13C NMR (DMSO-d6) δ 172.70, 169.77, 167.54, 167.00, 157.98, 141.14, 134.56, 133.33, 131.47, 126.94, 121.58, 48.80, 38.98, 38.70, 32.01, 30.90, 21.95, 19.46, 13.64; Anal. Calcd. For C19H22N4O5: C, 59.06; H, 5.74; N, 14.50. Found: C, 59.24; H, 5.53; N, 14.37.

Workup

  1. additionwas added
  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 residue was purified by chromatography (SiO2, CH2Cl2: EtOAc 1:1)

Sources & evidence

ORD record
ord-07bf8e387c794338a21e77a175c37652
Source dataset
uspto-grants-2011_09
Patent number
US08012997B2

Reaction notes

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