Water → 1-(3-Cyclopentyl-propyl)-3-(4-nitro-phenyl)-1,3-dihydro-imidazol-2-one

HRID 1071166Notes

Reaction equation

[CH:1]1([CH2:6][CH2:7][CH2:8][NH:9][CH2:10][CH:11](OC)OC)[CH2:5][CH2:4][CH2:3][CH2:2]1.[N+:16]([C:19]1[CH:24]=[CH:23][C:22]([N:25]=[C:26]=[O:27])=[CH:21][CH:20]=1)([O-:18])=[O:17].FC(F)(F)C(O)=O.O>C(Cl)Cl>[CH:1]1([CH2:6][CH2:7][CH2:8][N:9]2[CH:10]=[CH:11][N:25]([C:22]3[CH:21]=[CH:20][C:19]([N+:16]([O-:18])=[O:17])=[CH:24][CH:23]=3)[C:26]2=[O:27])[CH2:2][CH2:3][CH2:4][CH2:5]1

Participants

Conditions

Temperature: 0 °C

Procedure

The product from Example 48 (2.6 g, 12.1 mmol) was dissolved in CH2Cl2 (30 mL) and cooled to 0° C. 4-Nitrophenylisocyanate (1.98 g, 12.1 mmol) was added, and the mixture was allowed to warm to 23° C. The reaction was diluted with additional CH2Cl2 (30 mL) and cooled to 0° C. before a 1:1 solution of trifluoroacetic acid and water was added. The biphasic solution was vigorously stirred for 18 hours at ambient temperature. The layers were separated, and the aqueous layer was extracted with CHCl3. The combined organic layers were washed with saturated NaHCO3, brine, dried (MgSO4), and concentrated to a yellow solid. Mp 105-107° C. Rf=0.4 (2:1 hexanes/ethyl acetate); 1H NMR (300 MHz, DMSO-d6) δ 8.30 (d, 2H), 8.11 (d, 2H), 7.26 (d, 1H), 6.91 (d, 1H), 3.57 (t, 2H), 1.71 (m, 3H), 1.63 (m, 2H), 1.47 (m, 4H), 1.24 (m, 2H), 1.03 (m, 2H); MS (CI) m/z 316 (MH+).

Workup

temperatureto warm to 23° C
additionwas added
customThe layers were separated
extractionthe aqueous layer was extracted with CHCl3
washThe combined organic layers were washed with saturated NaHCO3, brine
dry with materialdried (MgSO4)
concentrationconcentrated to a yellow solid

Sources & evidence

ORD record: ord-74d6fcc8e0594cda80551e6173ffc366
Source dataset: uspto-grants-2005_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06903218B2

Reaction notes

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