Potassium Carbonate → N2-Butyl-8-(methoxy)-9-[2-(tetrahydro-3-furanyl)ethyl]-9H-Purine-2,6-diamine

HRID 1010995Notes

Reaction equation

FC(F)(F)C(O)=O.[CH2:8]([NH: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][CH2:33][CH:34]1[CH2:38][CH2:37][O:36][CH2:35]1>CN(C=O)C>[CH2:8]([NH:12][C:13]1[N:21]=[C:20]2[C:16]([N:17]=[C:18]([O:22][CH3:23])[N:19]2[CH2:32][CH2:33][CH:34]2[CH2:38][CH2:37][O:36][CH2:35]2)=[C:15]([NH2:24])[N:14]=1)[CH2:9][CH2:10][CH3:11]

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of N2-butyl-8-methoxy-9H-purine-2,6-diamine trifluoroacetic acid salt, (200 mg) and potassium carbonate (236 mg) in dry DMF (2 mL) were heated at 60° C. with stirring for 1 h. 3-(2-Bromoethyl)tetrahydrofuran, Intermediate 83 (123 mg) was added and the reaction was continued for 2 h at 60° C. The mixture was quenched with water and extracted with EtOAc (×3). The combined organics were washed with water and brine, dried using a hydrophobic frit and evaporated to an oil (261 mg). This material was purified by flash chromatography (silica, 5-20% methanol:ethyl acetate) and the appropriate fractions combined and evaporated to give the title compound, yield 181 mg.

Workup

waitthe reaction was continued for 2 h at 60° C
customThe mixture was quenched with water
extractionextracted with EtOAc (×3)
washThe combined organics were washed with water and brine
customdried
customevaporated to an oil (261 mg)
customThis material was purified by flash chromatography (silica, 5-20% methanol:ethyl acetate)
customevaporated

Sources & evidence

ORD record: ord-0ebee7e2be464f5ca0ea9a2a194eb590
Source dataset: uspto-grants-2011_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07977344B2

Reaction notes

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