反应详情

To a solution of 1-benzoyl-6-fluoro-3-(1-methyl-4-piperidinyl)-1H-indazole (2.0 g, 5.93 mmol) in dichloromethane (100 ml) was added phenyl chloroformate (3.9 ml, 29.65 mmol) at room temperature. The reaction mixture was stirred at room temperature for 24 hours, refluxed for an additional 0.5 hours and subsequently concentrated. The remaining residue was dissolved into dichloromethane and washed with 10% HCl (aq.). The organic phase was dried (MgSO4), filtered, and concentrated to give an oil which was purified via flash column chromatography (silica gel, 20% DCM/EtOAc). Concentration of the product-containing fractions gave an oil which solidified on standing. The white solid was washed with EtOAc, leaving 0.47 g of the desired product, m.p. 137°-139° C.

1. temperaturerefluxed for an additional 0.5 hours
2. concentrationsubsequently concentrated
3. dissolutionThe remaining residue was dissolved into dichloromethane
4. washwashed with 10% HCl (aq.)
5. dry with materialThe organic phase was dried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated
8. customto give an oil which
9. customwas purified via flash column chromatography (silica gel, 20% DCM/EtOAc)
10. customConcentration of the product-containing fractions gave an oil which
11. washThe white solid was washed with EtOAc