1-Methylpiperazine → HCID 90402487, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(7-(4-chlorobenzyl)-3-methyl-2,6-dioxo-8-(3-(trifluoromethoxy)phenoxy)-2,3,6,7-tetrahydro-1H-purin-1-yl)acetic acid (80 mg, 0.152 mmol, example 9) in NMP (2 mL) was added TEA (0.1 mL, 0.614 mmol), 1-methylpiperazine (0.07 mL, 0.614 mmol) and O-(7-aza-1H-benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (87 mg, 0.231 mmol); then the mixture was stirred at 60° C. for 16 h. Then the mixture was diluted with ethyl acetate and water, the phases were separated. The organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated to give crude product. This crude material was purified by recrystallization from methanol to give 7-(4-chlorobenzyl)-3-methyl-1-(2-(4-methylpiperazin-1-yl)-2-oxoethyl)-8-(3-(trifluoromethoxy)phenoxy)-1H-purine-2,6(3H,7H)-dione (25 mg, 27.5% yield) as white solid. 1H-NMR (DMSO-d6) δ 7.62-7.59(t, 1H), 7.55(s, 1H), 7.49-7.39(m, 5H), 7.36-7.34(d, 1H), 5.43(s, 2H), 4.71(s, 2H), 3.55-3.48(m, 4H), 3.30(s, 3H), 2.46-2.36(m, 4H), 2.21(s, 3H). LCMS retention time 2.298 min; LCMS MH+ 607.

Provenance & Evidence