Ethyl isocyanate → N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}(ethylamino)carboxamide

HRID 2103481Notes

Reaction equation

HRID 2103481 reaction equation
Cl.[NH2:2][CH2:3][C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[C:6](=[O:22])[N:7]([CH:14]1[CH2:19][CH2:18][C:17](=[O:20])[NH:16][C:15]1=[O:21])[C:8]2=[O:13].[CH2:23]([N:25]=[C:26]=[O:27])[CH3:24]>CC#N>[O:21]=[C:15]1[CH:14]([N:7]2[C:6](=[O:22])[C:5]3[C:9](=[CH:10][CH:11]=[CH:12][C:4]=3[CH2:3][NH:2][C:26]([NH:25][CH2:23][CH3:24])=[O:27])[C:8]2=[O:13])[CH2:19][CH2:18][C:17](=[O:20])[NH:16]1

Participants

4

Reactant 2

HCID 8022Ethyl isocyanateHCID 219885254-(aminomethyl)-2-(2,6-dioxopiperidin-3-yl)-2,3-dihydro-1H-isoindole-1,3-dione hydrochloride

Product 1

HCID 9968718N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}(ethylamino)carboxamideYield 30.2%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

(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 (0.60 g, 1.85 mmol) in CH3CN (50 ml). After stirring for 20 min, ethyl isocyanate (0.16 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 residue was purified by chromatography (SiO2, CH2Cl2:CH3CN 6:4) to give N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}(ethylamino)carboxamide (0.2 g, 30%) as a white solid: mp 173-175° C.; 1H NMR (DMSO-d6) δ d 11.13 (s, 1H), 7.86-7.69 (m, 3H), 6.44 (t, J=6.1 Hz, 1H), 6.11 (t, J=5.55 Hz, 1H), 5.18-5.11 (dd, J=5.4 and 12.6 Hz, 1H), 4.63 (d, J=6.1 Hz, 2H), 3.07-2.83 (m, 3H), 2.64-2.49 (m, 2H), 2.08-2.04 (m, 1H), 0.99 (t, J=7.1 Hz, 3H); 13C NMR (DMSO-d6) δ d 172.73, 169.80, 167.58, 167.03, 157.93, 141.15, 134.61, 133.37, 131.49, 126.96, 121.61, 48.83, 38.71, 34.17, 30.92, 21.98, 15.58; Anal. Calcd. For C17H18N4O5+0.14H2O: C, 56.58; H, 5.11; N, 15.53. Found: C, 56.56; H, 5.05; N, 15.28.

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:CH3CN 6:4)

Sources & evidence

ORD record
ord-a0ed5e2b2c4e4f8fa15768f08e74bf0a
Source dataset
uspto-grants-2009_08
Patent number
US07576104B2

Reaction notes

Loading…