反应详情

To a solution of 59 mg (0.3 mmol) of 5,6-difluoro-1H-indole-7-carboxylic acid and 96 mg of TBTU (0.3 mmol) in 3 ml DMF, were added 0.26 ml (1.5 mmol) of N,N-diisopropylethyl amine. After stirring for 5 min at rt, 96 mg (0.3 mmol) of (4-tert-butyl-benzyl)-[2-(3-chloro-2-fluoro-phenyl)-ethyl]-amine in 2 ml DMF were added. After stirring for 23 h at rt, the reaction mixture was diluted with 50 ml water and extracted with EtOAc (2×). The combined organic phases were washed with water and brine, dried with magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography (8 g silica gel; EtOAc/heptane 1:6) to give 78 mg white solid (46%). MS (ISP) 499.2 (M+H)+.

1. stirringAfter stirring for 23 h at rt
2. extractionextracted with EtOAc (2×)
3. washThe combined organic phases were washed with water and brine
4. dry with materialdried with magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by column chromatography (8 g silica gel; EtOAc/heptane 1:6)