Methanol → 4-(2,6-dioxo-1,3-dipropyl-2,3,6,7-tetrahydro-1H-purin-8-yl)-bicyclo[2.2.2]octane-1-carboxylic acid methyl ester

HRID 2105639Notes

Reaction equation

HRID 2105639 reaction equation
[O:1]=[C:2]1[N:10]([CH2:11][CH2:12][CH3:13])[C:9]2[N:8]=[C:7]([C:14]34[CH2:21][CH2:20][C:17]([C:22]([OH:24])=[O:23])([CH2:18][CH2:19]3)[CH2:16][CH2:15]4)[NH:6][C:5]=2[C:4](=[O:25])[N:3]1[CH2:26][CH2:27][CH3:28].CO.[C:31]([O-])(O)=O.[Na+]>OS(O)(=O)=O.CCOC(C)=O>[CH3:31][O:23][C:22]([C:17]12[CH2:20][CH2:21][C:14]([C:7]3[NH:6][C:5]4[C:4](=[O:25])[N:3]([CH2:26][CH2:27][CH3:28])[C:2](=[O:1])[N:10]([CH2:11][CH2:12][CH3:13])[C:9]=4[N:8]=3)([CH2:19][CH2:18]1)[CH2:15][CH2:16]2)=[O:24]

Participants

6

Reactant 3

HCID 887MethanolHCID 516892Sodium BicarbonateHCID 98865894-(2,6-dioxo-1,3-dipropyl-2,3,6,7-tetrahydro-1H-purin-8-yl)-bicyclo[2.2.2]octane-1-carboxylic acid

Product 1

HCID 98440604-(2,6-dioxo-1,3-dipropyl-2,3,6,7-tetrahydro-1H-purin-8-yl)-bicyclo[2.2.2]octane-1-carboxylic acid methyl esterYield 97%

Reagents, catalysts & solvents 2

HCID 1118Sulfuric AcidCatalystHCID 8857Ethyl AcetateSolvent

Procedure

4-(2,6-Dioxo-1,3-dipropyl-2,3,6,7-tetrahydro-1H-purin-8-yl)-bicyclo[2.2.2]octane 1-carboxylic acid (Example 13) (1.50 g. 3.86 mmol) was combined with 60 ml of MeOH, and 10 drops of conc'd H2SO4. The reaction solution was brought to reflux until consumption of starting material ceased. Sat'd NaHCO3 was then added until neutral pH and the reaction mixture was conc'd in vacuo. The residue was taken up in EtOAc and washed with sated NaHCO3, brine, and dried over Na2SO4. The EtOAc solution was conc'd in vacuo to give 1.51 g (97% yield) of a white solid. (MH+=403.13)

Workup

  1. temperatureto reflux until consumption of starting material
  2. washwashed with sated NaHCO3, brine
  3. dry with materialdried over Na2SO4

Sources & evidence

ORD record
ord-337c92282099492fb29d157eb54e940b
Source dataset
uspto-grants-2009_08
Patent number
US07579354B2

Reaction notes

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