反应详情

温度

45 °C

To a solution of 6-(2,4-dichloro-phenyl)-imidazo[1,2-a]pyridine-7-carbaldehyde (104 mg, 0.36 mmol) in DCM (5 mL) were successively added 2-methyl-2-propane-sulfinamide (47.6 mg, 0.39 mmol) and titanium tetraisopropoxyde (0.21 mL, 0.72 mmol) at RT, then the mixture was heated at 45° C. and stirred for 14 h. The reaction mixture was cooled to RT, quenched by the successive addition of MeOH (2 mL) and several drops of a saturated NaHCO3 solution in water. The resulting precipitate was filtered through a Na2SO4 pad, the solid was washed with AcOEt and the filtrate was evaporated to dryness. The remaining residue was purified by Combi-Flash Companion™ (Isco Inc.) column chromatography (SiO2; gradient elution, [hexane/DCM 1:1]/TBME 95:5→100% TBME) to yield the title compound (101 mg, 0.26 mmol, 72%). MS: 394 [M+1]+; HPLC: AtRet=1.58; TLC: RF 0.33 (hexane/DCM/TBME 1:1:6).

1. customat RT
2. temperatureThe reaction mixture was cooled to RT
3. customquenched by the successive addition of MeOH (2 mL) and several drops of a saturated NaHCO3 solution in water
4. filtrationThe resulting precipitate was filtered through a Na2SO4 pad
5. washthe solid was washed with AcOEt
6. customthe filtrate was evaporated to dryness
7. customThe remaining residue was purified by Combi-Flash Companion™ (Isco Inc.) column chromatography (SiO2; gradient elution, [hexane/DCM 1:1]/TBME 95:5→100% TBME)