1,2-Dimethoxyethane → HCID 20817053, compound

Participants

Reaction Steps

cis-3-Methyl-1-[4-(4-methylpiperazino)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine (3.0 g, 6.80 mmol), 4-formylphenylboronic acid (1.22 g, 8.16 mmol), palladium tetrakistriphenyphosphine (0.47 g, 0.41 mmol) and sodium carbonate (1.73 g, 16.31 mmol) were mixed with ethylene glycol dimethyl ether (70 mL) and water (35 mL). The reaction mixture was heated at reflux overnight under nitrogen. Organic solvent was removed under reduced pressure and the aqueous layer was filtered and washed with water. After drying on the lyophilizer, the residue was purified by flash column chromatography using dichloromethane/methanol (90:10 to 70:30) as mobile phase to give 4-{4-amino-1-[4-(4-methylpiperazino)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-3-yl}benzaldehyde (1.55 g, 54%). 1H NMR (DMSO-d6) δ 1.60 (m, 2H), 1.72 (m, 2H). 2.07 (m, 2H), 2.15 (s, 3H), 2.22-2.46 (m, 1H), 4.83 (m, 1H), 7.88 (d, J=8.13 Hz, 2H), 8.07 (d, J=8.10 Hz, 2H), 8.21 (s, 1H), 10.11 (s, 1H). LCMS (Thermoquest AQA single Quad MS, Finnigan HPLC-Column: Genesis, C18, 3 um, 33×4.6 mm. Eluents: 30% B/A to 95% B/A in 4.5 min. (B: acetonitrile, A: 50 mM ammonia acetate buffer, pH 4.5), 0.8 mL/min.): MH+=420.2, Rt=0.70 min.

Provenance & Evidence