2-Iodoxybenzoic acid → (6-Chloro-imidazo[1,2-b]pyridazin-3-yl)-[2-(2-trimethylsilanyl-ethoxymethyl)-2h-indazol-5-yl]-methanone
Reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([CH:11]([C:13]3[CH:21]=[CH:20][C:19]4[C:15](=[CH:16][N:17]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[N:18]=4)[CH:14]=3)[OH:12])=[CH:9][N:10]=2)[N:7]=1.I(C1C=CC=CC=1C(O)=O)(=O)=O>CC(C)=O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([C:11]([C:13]3[CH:21]=[CH:20][C:19]4[C:15](=[CH:16][N:17]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[N:18]=4)[CH:14]=3)=[O:12])=[CH:9][N:10]=2)[N:7]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
(rac)-(6-Chloro-imidazo[1,2-b]pyridazin-3-yl)-[2-(2-trimethylsilanyl-ethoxymethyl)-2H-indazol-5-yl]-methanol (Stage 195.4, 580 mg, 1.349 mmol) was dissolved in acetone (40 mL) and heated 1 h to reflux together with 2-iodoxybenzoic acid (1.133 g, 4.05 mmol). The RM was cooled down to rt and the acetone was removed under reduced pressure. The residue was mixed with 2 M NaOH solution and extracted with EtOAc. The combined organic layers were dried over Na2SO4 and the solvent was evaporated. The residue was purified by flash chromatography (CombiFlash® Companion System®, with RediSep® silica gel column, n-hexane/EtOAc=50:50->0: 100) to afford the title compound as a light brown foam (tR 7.11 min (conditions 3), MH+=428).