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

HRID 10021

Reaction equation

HRID 10021 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. 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 residue was purified by chromatography (SiO2, CH2Cl2:EtOAc 1:1)

Sources & evidence

ORD record
ord-66a3ea77b0e440e3847f18e88c61489f
Source dataset
uspto-grants-2006_08
Patent number
US07091353B2

Linked notes

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