反应详情

To a solution of 3-(methylthio)benzoic acid (200 mg, 1.2 mmol) in DMF (4.5 mL) was added in succession N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydroiodide (345 mg, 1.75 mmol) 1-hydroxybenzotriazole hydrate (186 mg, 1.2 mmol) and diisopropylethylamine (0.630 mL, 3.6 mmol). After stirring at room temperature for 10 min, 2,2-dimethyl-1-(5-(piperidin-3-ylamino)-1H-indazol-1-yl)propan-1-one (300 mg, 1.0 mmol) was added in one portion. The solution was stirred under a nitrogen atmosphere overnight. The solution was poured into 1.0 M HCl (20 mL), extracted twice with EtOAc, and the organic phases were washed with 10% NaOH, dried over Na2SO4 and evaporated. Chromatography of the residue on silica gel, eluting with EtOAc/heptane, gave the title compound as a pale yellow foam (240 mg, 53%).

1. stirringThe solution was stirred under a nitrogen atmosphere overnight
2. extractionextracted twice with EtOAc
3. washthe organic phases were washed with 10% NaOH
4. dry with materialdried over Na2SO4
5. customevaporated
6. washChromatography of the residue on silica gel, eluting with EtOAc/heptane