反应详情

To a solution of 0.040 g (0.19 mmol) 6-chloro-2-methyl-1H-indole-3-carboxylic acid, 0.069 ml (0.40 mmol) N,N-diisopropylethylamine and 0.061 g (0.19 mmol) 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate in 1 ml dry N,N-dimethylformamide were added 0.036 g (0.19 mmol) spiro[isobenzofuran-1(3H), 4′-piperidine] at room temperature. After stirring for 1 h the reaction mixture was quenched with 0.5 M aqueous sodium hydroxide solution (20 ml) and extracted with ethyl acetate (2×30 ml). The combined organic layers were washed with water (2×30 ml) and brine (1×30 ml), dried over sodium sulfate and concentrated in vacuo. The residue was purified by flash chromatography (n-heptane/ethyl acetate) to give the title compound (0.036 g, 49%) as a white solid.

1. customwas quenched with 0.5 M aqueous sodium hydroxide solution (20 ml)
2. extractionextracted with ethyl acetate (2×30 ml)
3. washThe combined organic layers were washed with water (2×30 ml) and brine (1×30 ml)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated in vacuo
6. customThe residue was purified by flash chromatography (n-heptane/ethyl acetate)