反应详情

A round-bottom flask was charged with 2-chloro-1-fluoro-4-methoxybenzene (Alfa Aesar, Ward Hill, Mass., 2.714 g, 16.90 mmol), DCM (24.86 ml), AcOH (24.86 ml), and sulfuric acid (0.496 ml, 9.30 mmol) to give a solution. n-iodosuccinimide (3.80 g, 16.90 mmol) was added in a single portion. TLC showed what appeared to be conversion of the starting material to a slightly higher, move UV-active spot. The mixture was diluted with DCM, washed with water (2×), washed with saturated aq. sodium thiosulfate, dried over sodium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica gel (50-g SNAP Ultra column, 0-10% EtOAc/Heptane) to give 3.409 g of a clear oil. This oil was used directly in the next reaction without further purification.

1. customto give a solution
2. washwashed with water (2×)
3. washwashed with saturated aq. sodium thiosulfate
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by chromatography on silica gel (50-g SNAP Ultra column, 0-10% EtOAc/Heptane)