3-(Trifluoromethyl)phenol → 7-(4-chlorobenzyl)-3-methyl-8-(3-(trifluoromethyl)phenoxy)-1H-purine-2,6(3H,7H)-dione

HRID 2200640Notes

Reaction equation

Br[C:2]1[N:10]([CH2:11][C:12]2[CH:17]=[CH:16][C:15]([Cl:18])=[CH:14][CH:13]=2)[C:9]2[C:8](=[O:19])[NH:7][C:6](=[O:20])[N:5]([CH3:21])[C:4]=2[N:3]=1.[F:22][C:23]([F:32])([F:31])[C:24]1[CH:25]=[C:26]([OH:30])[CH:27]=[CH:28][CH:29]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.C(OCC)(=O)C>[Cl:18][C:15]1[CH:16]=[CH:17][C:12]([CH2:11][N:10]2[C:9]3[C:8](=[O:19])[NH:7][C:6](=[O:20])[N:5]([CH3:21])[C:4]=3[N:3]=[C:2]2[O:30][C:26]2[CH:27]=[CH:28][CH:29]=[C:24]([C:23]([F:22])([F:31])[F:32])[CH:25]=2)=[CH:13][CH:14]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of 8-bromo-7-(4-chlorobenzyl)-3-methyl-1H-purine-2,6(3H,7H)-dione (240 mg, 0.649 mmol, intermediate 8) in dimethyl formamide (5 mL) was added 3-(trifluoromethyl)phenol (105 mg, 0.649 mmol) followed by potassium carbonate (107 mg, 0.779 mmol). The resulting mixture was stirred at 80° C. for 6 h. The mixture was diluted with ethyl acetate (15 mL) and extracted with brine and saturated aqueous ammonium chloride solution. Then the organic phase was dried and concentrated to give a crude solid product which was collected and washed with ethanol to give 7-(4-chlorobenzyl)-3-methyl-8-(3-(trifluoromethyl)phenoxy)-1H-purine-2,6(3H,7H)-dione (237 mg, 81.1% yield) as white solid. 1H-NMR (DMSO-d6) δ 11.24 (s, 1H), 7.77 (s, 1H), 7.69-7.71 (m, 3H), 7.43 (s, 4H), 5.42 (s, 2H), 3.22 (s, 3H). LCMS retention time 2.306 min; LCMS MH+ 451.

Workup

extractionextracted with brine and saturated aqueous ammonium chloride solution
customThen the organic phase was dried
concentrationconcentrated
customto give a crude solid product which
customwas collected
washwashed with ethanol

Sources & evidence

ORD record: ord-3b579d6290cf49bf9e869e3dd97ce382
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09359359B2

Reaction notes

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