反应详情

Copper (I) iodide (25 mg) and bis-(triphenylphosphin)-palladium(II)-chloride (30 mg) are added to 6-chloro-4-iodo-pyridin-3-ol (200 mg) in N,N-dimethylformamide (3 mL) under an argon atmosphere. Triethylamine (110 μL) is added and the resulting mixture is stirred at room temperature for 1 h. A solution of 4-ethynyl-piperidine-1-carboxylic acid tert-butyl ester (175 mg) in N,N-dimethylformamide (2 mL) is added dropwise and the reaction mixture is stirred at 55° C. for 3 h. The solvent is evaporated and the residue is chromatographed on silica gel (cyclohexane/ethyl acetate 70:30) to give the title compound. LC (method 2): tR=1.40 min; Mass spectrum (ESI+): m/z=337 [M+H]+.

1. stirringthe reaction mixture is stirred at 55° C. for 3 h
2. customThe solvent is evaporated
3. customthe residue is chromatographed on silica gel (cyclohexane/ethyl acetate 70:30)