反应详情

A vial was charged with 5-methoxy-1-methylindolin-2-one (144 mg, 0.813 mg), 3-iodo-1H-indazole-6-carbaldehyde (221 mg, 0.813 mmol), MeOH (4.0 mL), and piperidine (7 uL, 0.081 mmol). The mixture was reacted at 50° C. for 18 h. The resulting orange product precipitate was filtered washing with MeOH and then dried under high vacuum. The orange solid was then added to a suspension of 60% NaH (155 mg, 3.87 mmol) and trimethylsulfoxonium iodide (284 mg, 1.29 mmol) in DMF (3.0 mL) that had been pre-stirred at room temperature for 30 min. This mixture was heated to 40° C. for 2 h. The reaction was cooled to 0° C., quenched with NH4Cl (sat.) (2 mL) and extracted with EtOAc (100 mL). The organic layer was separated, washed with brine (10 mL) and dried over MgSO4. The solvent was removed and the residue purified by column chromatography (silica gel, 16-25% acetone in hexane) to give the title compound (pink solid, 205 mg, 57% over 2 steps); MS ESI 446.0 [M+H]+, calcd for [C19H16IN3O2+H]+ 446.04.

1. customThe mixture was reacted at 50° C. for 18 h
2. filtrationThe resulting orange product precipitate was filtered
3. washwashing with MeOH
4. customdried under high vacuum
5. temperatureThis mixture was heated to 40° C. for 2 h
6. temperatureThe reaction was cooled to 0° C.
7. customquenched with NH4Cl (sat.) (2 mL)
8. extractionextracted with EtOAc (100 mL)
9. customThe organic layer was separated
10. washwashed with brine (10 mL)
11. dry with materialdried over MgSO4
12. customThe solvent was removed
13. customthe residue purified by column chromatography (silica gel, 16-25% acetone in hexane)