Potassium Carbonate → N2-Butyl-8-methoxy-9-(tetrahydro-2H-pyran-2-ylmethyl)-9H-purine-2,6-diamine

HRID 1010930Notes

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][CH:33]1[CH2:38][CH2:37][CH2:36][CH2:35][O:34]1>CN(C)C=O.C(OCC)(=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][CH:33]2[CH2:38][CH2:37][CH2:36][CH2:35][O:34]2)=[C:15]([NH2:24])[N:14]=1)[CH2:9][CH2:10][CH3:11]

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of N2-butyl-8-methoxy-9H-purine-2,6-diamine trifluoroacetic acid salt (400 mg) in dry N,N-dimethylformamide (6 ml) at room temperature and under nitrogen was added potassium carbonate (630 mg) in one go. The reaction was stirred at 60° C. for 1.5 hours and then cooled to 50° C. 2-(Bromomethyl)tetrahydro-2H-pyran (175 μl) was added in one go and the reaction heated to 50° C. overnight and then at 90° C. for 2 hours. The reaction was diluted with ethyl acetate (20 ml) and washed with water (10 ml). The organic layer was separated and concentrated in vacuo. The product was semi-purified by MDAP to afford a mixture of the title compound and an isomer. This mixture was taken on without further purification.

Workup

temperaturecooled to 50° C
temperaturethe reaction heated to 50° C. overnight
waitat 90° C. for 2 hours
washwashed with water (10 ml)
customThe organic layer was separated
concentrationconcentrated in vacuo
customto afford

Sources & evidence

ORD record: ord-a7c41f9787484713ac0909a3114727c5
Source dataset: uspto-grants-2011_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07977344B2

Reaction notes

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