Sodium borohydride → HCID 90402742, compound

Participants

Reaction Steps

7-(4-Chlorobenzyl)-3-methyl-1-(2-oxobutyl)-8-(3-(trifluoromethoxy)phenoxy)-1H-purine-2,6(3H,7H)-dione (0.44 g, 0.82 mmol, example 363) was dissolved in methanol (8 mL) and DCM (1 mL), then cooled to 0° C. Sodium borohydride (0.93 g, 2.46 mmol) was added portion wise over 20 min and reaction was stirred in the cold for 2 h. The reaction solvent was removed under reduced pressure then the mixture was diluted with water (100 mL) and extracted with ethyl acetate (3×75 mL). The combined organic extracts were dried with magnesium sulfate, filtered and the solvent removed under reduced pressure to give a clear oil. The oil was purified using an 40 g silica gel flash column eluted with 1% methanol/DCM to give 7-(4-chlorobenzyl)-1-(2-hydroxybutyl)-3-methyl-8-(3-(trifluoromethoxy)phenoxy)-1H-purine-2,6(3H,7H)-dione (0.32 g, 73% yield) as a white solid. LCMS retention time=4.265 min and 97% purity, LCMS MH+ 539. 1H NMR (DMSO-d6) δ 7.59 (t, 1H, J=8 Hz), 7.45-7.48 (m, 1H), 7.38-7.45 (m, 5H), 7.30 (d, 1H, J=12 Hz), 5.43 (s, 2H), 4.56 (d, 1H, J=4 Hz), 3.92-4.00 (m, 1H), 3.65-3.76 (m, 2H), 3.28 (s, 3H), 1.23-1.41 (m, 2H).

Provenance & Evidence