Isopropyl isocyanate → HCID 21988520, compound

HRID 10024Notes

Reaction equation

HRID 10024 reaction equation
[N:1]12[CH2:11]CCN=[C:7]1[CH2:6]CCC[CH2:2]2.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(N=C=[O:39])(C)C>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:2]([N:1]([CH3:11])[CH2:7][CH3:6])=[O:39])[C:19]2=[O:24])[CH2:30][CH2:29][C:28](=[O:31])[NH:27]1

Participants

5

Reactant 3

HCID 61277Isopropyl 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 21988520HCID 21988520, compoundYield 36.3%

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, isopropyl isocyanate (0.24 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:CH3OH 97.5:2.5) to give N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}[(methylethylamino)]carboxamide (0.25 g, 36%) as a white solid: mp 180–182° C.; 1H NMR (DMSO-d6) δ 11.19 (s, 1H), 7.87–7.68 (m, 3H), 6.33 (t, J=5.9 Hz, 1H), 6.02 (d, J=7.5 Hz, 1H), 5.18–5.11 (dd, J=5.2 and 12.4 Hz, 1H), 4.62 (d, J=5.9 Hz, 2H), 3.73–3.35 (m, 1H), 2.98–2.83 (m, 1H), 2.63–2.50 (m, 2H), 2.08–2.04 (m, 1H), 1.04 (d, J=6.5 Hz, 6H); 13C NMR (DMSO-d6) δ 172.78, 169.85, 167.59, 167.05, 157.36, 141.16, 134.65, 133.39, 131.52, 126.98, 121.64, 48.82, 41.03, 38.64, 30.94, 23.18, 21.99; Anal. Calcd. For C18H20N4O5: C, 58.06; H, 5.41; N, 15.05. Found: C, 58.20; H, 5.44; N, 14.95.

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:CH3OH 97.5:2.5)

Sources & evidence

ORD record
ord-14a2688cb241477c9fd831bf678987b1
Source dataset
uspto-grants-2006_08
Patent number
US07091353B2

Reaction notes

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