Formaldehyde → HCID 57917452, compound

Participants

Reaction Steps

A flask was charged with MeOH (1 mL). 6-[6-(1-Azetidin-3-yl-1H-pyrazol-4-yl)-imidazo[1,2-b]pyridazin-3-ylmethyl]-7-fluoro-quinoline (Stage 146.1, 26 mg, 0.065 mmol), formaldehyde (9.7 μL, 0.130 mmol) and NaBH3CN (20 mg, 0.325 mmol) were then added. The pH was adjusted to 5-6 with a drop of acetic acid and the RM was stirred at rt for 2 h. The mixture was then diluted with DCM, washed with NaHCO3 and brine. The organic layer was dried over Na2SO4, filtered and concentrated. The residue was purified by flash chromatography (CombiFlash® Companion System®, with a 4 g RediSep® silica gel column, DCM/(DCM/MeOH 19:1)=100:0→0:100)). The residue crystallized in DCM. The solid was filtered off, and dissolved in EtOAc. The solution was washed again with NaHCO3, dried over Na2SO4, filtered and concentrated to afford the title compound as a foam (tR 2.93 min (conditions 3), MH+=414.1, 1H-NMR in DMSO-d6: 8.85 (m, 1H); 8.60 (s, 1H); 8.35 (m, 1H); 8.09 (m, 3H); 7.77 (m, 1H); 7.58 (m, 2H); 7.47 (m, 1H); 5.01 (m, 1H); 4.55 (s, 2H); 3.71 (m, 2H); 3.40 (m, 2H); 2.34 (s, 3H))

Provenance & Evidence