反应详情

(rac)-1-(6-Chloro-imidazo[1,2-b]pyridazin-3-yl)-2,2,2-trifluoro-1-quinolin-6-yl-ethanol (6-chloro-imidazo[1,2-b]pyridazin-3-yl)-quinolin-6-yl-methanone (Stage 1.2, 411 mg, 1.331 mmol) was dissolved in THF (1.5 mL) and DMF (1.5 mL) together with (trifluoromethyl)trimethylsilane (0.255 mL, 1.598 mmol) and the mixture was cooled down to 0° C. TBAF solution (1 M, 0.067 mL) was then added slowly. After 5 min, the RM was allowed to warm up to rt. After 24 h of stirring, it was warmed up to 50° C. and stirred for 24 h more. The reaction was then quenched with 1 N HCl. The precipitate formed was filtered off and identified as remaining pure starting material The solution was basified with pellets of NaOH. The second precipitate formed and filtered off was starting material as well. The aqueous layer was extracted twice with EtOAc and then the joined organics were washed with brine and dried over Na2SO4. After removing the solvent, the residue was purified by MPLC with DCM and MeOH to give the title compound as a brown solid (tR 0.8 min (conditions 2), MH+=379).

1. temperatureit was warmed up to 50° C.
2. stirringstirred for 24 h more
3. customThe reaction was then quenched with 1 N HCl
4. customThe precipitate formed
5. filtrationwas filtered off
6. customThe second precipitate formed
7. filtrationfiltered off
8. extractionThe aqueous layer was extracted twice with EtOAc
9. washthe joined organics were washed with brine
10. dry with materialdried over Na2SO4
11. customAfter removing the solvent
12. customthe residue was purified by MPLC with DCM and MeOH