Potassium Carbonate → 2-Butoxy-8-methoxy-9-(tetrahydrofuran-3-ylmethyl)-9H-purin-6-amine

HRID 1010932Notes

Reaction equation

FC(F)(F)C(O)=O.[CH2:8]([O:12][C:13]1[N:21]=[C:20]2[C:16]([N:17]=[C:18]([O:22][CH3:23])[NH:19]2)=[C:15]([NH2:24])[N:14]=1)[CH2:9][CH2:10][CH3:11].C(=O)([O-])[O-].[K+].[K+].Br[CH2:32][CH:33]1[CH2:37][CH2:36][O:35][CH2:34]1>CN(C)C=O>[CH2:8]([O:12][C:13]1[N:21]=[C:20]2[C:16]([N:17]=[C:18]([O:22][CH3:23])[N:19]2[CH2:32][CH:33]2[CH2:37][CH2:36][O:35][CH2:34]2)=[C:15]([NH2:24])[N:14]=1)[CH2:9][CH2:10][CH3:11]

Participants

Conditions

Temperature: 60 °C

Procedure

2-Butoxy-8-methoxy-9H-purin-6-amine trifluoroacetate salt (0.20 g) was dissolved in anhydrous N,N-dimethylformamide (5 mL) was treated with anhydrous potassium carbonate (0.315 g), heated to 60° C. for 1 hour and then cooled to room temperature. To the above was added 3-(bromomethyl)tetrahydrofuran (0.103 g) and the reaction mixture heated at 50° C., overnight. The reaction mixture was quenched with water (25 mL) and extracted into ethyl acetate (3 times, 100 mL combined total volume). The combined organic phase was separated and passed through a hydrophobic frit to dry. The organic phase was stripped to give a gum which was purified by C18 reverse phase chromatography using water (containing 0.1% formic acid)-acetonitrile (containing 0.05% formic acid) as eluant (20-60%) to afford the title compound as a white solid (97 mg).

Workup

temperaturecooled to room temperature
temperaturethe reaction mixture heated at 50° C., overnight
customThe reaction mixture was quenched with water (25 mL)
extractionextracted into ethyl acetate (3 times, 100 mL combined total volume)
customThe combined organic phase was separated
customto dry
customto give a gum which
customwas purified by C18 reverse phase chromatography

Sources & evidence

ORD record: ord-d9a3d438a04642ec8fdf822a6e281a42
Source dataset: uspto-grants-2011_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07977344B2

Reaction notes

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