反应详情

A solution of ethyl 7-(formylamino)chroman-2-carboxylate (1.54 g; 6.00 mmol) in anhydrous THF, under nitrogen, is treated dropwise with a 1 M solution of lithium aluminum hydride in THF (30 mL; 30 mmol), stirred at ambient temperature for 4 h, quenched with a 10% solution of water in THF, with cooling as necessary to maintain room temperature, poured into water and extracted with ethyl acetate. The combined extracts are washed with brine, dried over MgSO4 and concentrated in vacuo to afford the title compound as a straw colored oil (1.13 g; 98% yield), identified by NMR spectral analysis.

1. customquenched with a 10% solution of water in THF
2. temperaturewith cooling as necessary
3. temperatureto maintain room temperature
4. additionpoured into water
5. extractionextracted with ethyl acetate
6. washThe combined extracts are washed with brine
7. dry with materialdried over MgSO4
8. concentrationconcentrated in vacuo