Ethyl bromoacetate → 4-[1-(2,2-Dimethylpropionyloxymethyl)-3-ethoxycarbonylmethyl-7-(3-methylbut-2-enyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

HRID 1792060Notes

Reaction equation

HRID 1792060 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:22]([CH2:23][CH:24]=[C:25]([CH3:27])[CH3:26])[C:21]3[C:20](=[O:28])[N:19]([CH2:29][O:30][C:31](=[O:36])[C:32]([CH3:35])([CH3:34])[CH3:33])[C:18](=[O:37])[NH:17][C:16]=3[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].Br[CH2:45][C:46]([O:48][CH2:49][CH3:50])=[O:47]>CN(C)C=O.C(OCC)(=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:22]([CH2:23][CH:24]=[C:25]([CH3:26])[CH3:27])[C:21]3[C:20](=[O:28])[N:19]([CH2:29][O:30][C:31](=[O:36])[C:32]([CH3:35])([CH3:34])[CH3:33])[C:18](=[O:37])[N:17]([CH2:45][C:46]([O:48][CH2:49][CH3:50])=[O:47])[C:16]=3[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

6

Reactant 3

HCID 7748Ethyl bromoacetateHCID 11430Potassium CarbonateHCID 235369434-[1-(2,2-Dimethylpropionyloxymethyl)-7-(3-methylbut-2-enyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

Product 1

HCID 235369614-[1-(2,2-Dimethylpropionyloxymethyl)-3-ethoxycarbonylmethyl-7-(3-methylbut-2-enyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

4-[1-(2,2-Dimethylpropionyloxymethyl)-7-(3-methylbut-2-enyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester (43 mg) and potassium carbonate (13 mg) were suspended in N,N-dimethylformamide (1 ml), and ethyl bromoacetate (9.6 μl) was added to the suspension. After the reaction mixture was stirred at room temperature for 13 hours, the mixture was diluted with ethyl acetate, washed with water, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation from the organic layer to give 44 mg of the title compound. δ: 1.19 (s, 9H) 1.23–1.51 (m, 3H) 1.48 (s, 9H) 1.74 (s, 6H) 3.14–3.20 (m, 4H) 3.52–3.58 (m, 4H) 4.17–4.27 (m, 2H) 4.68–4.72 (m, 2H) 4.75 (s, 2H) 5.37–5.42 (m, 1H) 6.03 (s, 2H)

Workup

  1. washwashed with water
  2. dry with materialdried over anhydrous magnesium sulfate
  3. customThe solvent was removed by distillation from the organic layer

Sources & evidence

ORD record
ord-8aa5a0eab0d0486fbd83bdd5e7ac8abf
Source dataset
uspto-grants-2006_07
Patent number
US07074798B2

Reaction notes

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