2-[2-(4-Methylpiperazin-1-yl)ethoxy]aniline → N-methyl-4-(2-(2-(2-(4-methylpiperazin-1-yl)ethoxy)phenylamino)benzo[d]thiazol-6-yloxy)picolinamide

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To the solution of N-methyl-4-(2-(methylsulfinyl)benzo[d]thiazol-6-yloxy)picolinamide (25 mg, 0.072 mmol, 1.0 eq) in 1 mL of IPA and 1 mL conc. HCl was added 2-(2-(4-methylpiperazin-1-yl)ethoxy) aniline (25 mg, 0.108 mmol, 1.5 eq) and reaction mixture heated at 80° C. in oil bath for 2 hours. Thereafter, the product was purified via reverse phase HPLC. This procedure was generalized for other analogues for which progress of the reaction was monitored by LC-MS and amount of aniline and reaction time adjusted as needed. LC/MS (m/z) [519.1] (MH+)

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