Benzyl Bromide → Ethyl 2-(3-benzyl-2-oxoimidazolidin-1-yl)-4-methylthiazole-5-carboxylate

HRID 2067349Notes

Reaction equation

HRID 2067349 reaction equation
[CH3:1][C:2]1[N:3]=[C:4]([N:12]2[CH2:16][CH2:15][NH:14][C:13]2=[O:17])[S:5][C:6]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8].C(=O)([O-])[O-].[K+].[K+].[CH2:24](Br)[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1>CC(C)=O>[CH2:24]([N:14]1[CH2:15][CH2:16][N:12]([C:4]2[S:5][C:6]([C:7]([O:9][CH2:10][CH3:11])=[O:8])=[C:2]([CH3:1])[N:3]=2)[C:13]1=[O:17])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1

Participants

5

Reactant 3

HCID 7498Benzyl BromideHCID 11430Potassium CarbonateHCID 57919776Ethyl 4-methyl-2-(2-oxoimidazolidin-1-yl)thiazole-5-carboxylate

Product 1

HCID 57919811Ethyl 2-(3-benzyl-2-oxoimidazolidin-1-yl)-4-methylthiazole-5-carboxylateYield 93%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a suspension of ethyl 4-methyl-2-(2-oxoimidazolidin-1-yl)thiazole-5-carboxylate (0.51 g, 2.00 mmol) and potassium carbonate (0.49 g, 3.54 mmol) in acetone (30 mL) was added benzyl bromide (0.30 mL, 0.25 mmol). The reaction mixture was heated to reflux for 16 hours. The solvent was removed in vacuo, and the residue was washed with water (100 mL) and hexanes (30 mL) to afford the title compound in 93% yield (0.65 g): mp 122-124° C.; 1H NMR (300 MHz, DMSO-d6) δ 7.35-7.26 (m, 5H), 4.40 (s, 2H), 4.19 (q, J=7.2 Hz, 2H), 3.97 (t, J=7.5 Hz, 2H), 3.42 (t, J=7.5 Hz, 2H), 2.48 (s, 3H), 1.23 (t, J=7.2 Hz, 3H); MS (ES+) m/z 346.0 (M+1).

Workup

  1. temperatureThe reaction mixture was heated
  2. temperatureto reflux for 16 hours
  3. customThe solvent was removed in vacuo
  4. washthe residue was washed with water (100 mL) and hexanes (30 mL)

Sources & evidence

ORD record
ord-efa785becf5846e4a1f66529a421b9a2
Source dataset
uspto-grants-2012_10
Patent number
US08293768B2

Reaction notes

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