Methyl iodide → [1-(3-Chloro-4-cyano-2-methylphenyl)-3-methyl-2,5-dioxoimidazolidin-4-ylmethyl]carbamic Acid tert-butyl Ester

HRID 853821Notes

Reaction equation

HRID 853821 reaction equation
[C:1]([O:5][C:6](=[O:26])[NH:7][CH2:8][CH:9]1[C:13](=[O:14])[N:12]([C:15]2[CH:20]=[CH:19][C:18]([C:21]#[N:22])=[C:17]([Cl:23])[C:16]=2[CH3:24])[C:11](=[O:25])[NH:10]1)([CH3:4])([CH3:3])[CH3:2].[CH3:27][Si]([N-][Si](C)(C)C)(C)C.[K+].IC>CN(C=O)C.O>[C:1]([O:5][C:6](=[O:26])[NH:7][CH2:8][CH:9]1[C:13](=[O:14])[N:12]([C:15]2[CH:20]=[CH:19][C:18]([C:21]#[N:22])=[C:17]([Cl:23])[C:16]=2[CH3:24])[C:11](=[O:25])[N:10]1[CH3:27])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 3251421Potassium bis(trimethylsilyl)amideHCID 69517337HCID 69517337, compound

Product 1

HCID 69515564[1-(3-Chloro-4-cyano-2-methylphenyl)-3-methyl-2,5-dioxoimidazolidin-4-ylmethyl]carbamic Acid tert-butyl EsterYield 58.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of the hydantoin 13A (1.00 g, 2.64 mmol) in DMF (10 mL) was added KHMDS (530 mg, 2.64 mmol) followed by iodomethane (0.16 mL, 2.64 mmol) and the resulting solution was stirred at rt for 2 h. The solution was then diluted with water and extracted with EtOAc. The organic layer was washed with water and brine, dried (MgSO4), filtered and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, CH2Cl2/CH3OH, 100:0 to 80:20 gradient) to afford the title compound (608 mg) as a white foam. 1H NMR (CDCl3) δ 1.41, 1.43 (s, 9H), 2.26, 2.28 (s, 3H), 3.11, 3.12 (s, 3H), 3.60-3.86 (m, 2H), 4.08-4.12 (m, 1H), 4.77, 4.83 (br s, 1H), 7.16, 7.20 (d, J=8.3 Hz, 1H), 7.60, 7.61 (d, J=8.3 Hz, 1H); HPLC a) column: Phenominex C18 4.6×50 mm, 4 min gradient, 10% MeOH/90% H2O/0.1% TFA to 90% MeOH/10% H2O/0.1% TFA, 1 min hold, 4 mL/min, UV detection at 220 nm, 3.05 min retention time; HPLC b) column: Shimadzu Shim-Pack VP-ODS C18 4.6×50 mm, 4 min gradient, 10% MeOH/90% H2O/0.1% TFA to 90% MeOH/10% H2O/0.1% TFA, 1 min hold, 4 mL/min, UV detection at 220 nm, 2.86, 2.96 min retention time (98%); HPLC c) column: Daicel Chiralcel OD 4.6×250 mm, Isocratic 25% isopropanol/hexanes, 30 min, 1 mL/min, UV detection at 220 nm, 14.40 min retention time (97%); MS (ES) m/z 391 [M−H]−.

Workup

  1. extractionextracted with EtOAc
  2. washThe organic layer was washed with water and brine
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by flash chromatography (silica gel, CH2Cl2/CH3OH, 100:0 to 80:20 gradient)

Sources & evidence

ORD record
ord-fc2fcbc3671d446bb6020f1923559fde
Source dataset
uspto-grants-2007_08
Patent number
US07256208B2

Reaction notes

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