1,2-Dimethoxyethane → (Rac)-imidazo[1,2-a]pyridin-6-yl-[6-(1-methyl-1h-pyrazol-4-yl)-imidazo[1,2-b]pyridazin-3-yl]-methanol

Participants

Reaction Conditions

Reaction Steps

A microwave tube was charged under argon atm. with (rac)-(6-chloro-imidazo[1,2-b]pyridazin-3-yl)-imidazo[1,2-a]pyridin-6-yl-methanol (Stage 9.1, 89.9 mg, 0.3 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (62.4 mg, 0.3 mmol), Pd(PPh3)2Cl2 (6.3 mg) and 2 M K2CO3 (0.405 mL) and DME (1 mL). The mixture was heated at 80° C. for 3 h. The RM was taken up with DCM and washed with NaCl solution. After filtration of both layers, the solid part was dissolved in MeOH and evaporated to dryness. The residue was stirred in EtOAc and filtered to give the pure title compound. The organic layer of the first filtrate was dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (CombiFlash® Companion System®, with RediSep® silica gel column, DCM/MeOH=95:5—>80:20) to afford a second batch of the title compound (tR 2.57 min (conditions 3), MH+=346.2)

Provenance & Evidence