反应详情

To a solution of 1.0 g of tert-butyl 5-(chloromethyl)-3-(3-fluorophenyl)-1H-1-indazolecarboxylate in 5 ml dimethyl sulfoxide was added 204 mg of sodium cyanide, and the mixture was stirred at room temperature for 50 minutes. To the reaction mixture was added 50 ml of ethyl acetate, and after washing with water, the aqueous layer was re-extracted with diethyl ether. The collected organic layer was sequentially washed with water (×2) and brine, dried over anhydrous magnesium sulfate and the solvent was evaporated. The crude product was purified and separated by silica gel column chromatography (ethyl acetate:toluene=1:9), and suspended in diethyl ether-diisopropyl ether, to give 62 mg of the title compound as yellow crystals.

1. washafter washing with water
2. extractionthe aqueous layer was re-extracted with diethyl ether
3. washThe collected organic layer was sequentially washed with water (×2) and brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customthe solvent was evaporated
6. customThe crude product was purified
7. customseparated by silica gel column chromatography (ethyl acetate:toluene=1:9)