反应详情

To m-phenoxybenzyl α-bromoisovalerate (2 g, 0.0055 mole), 24°, is added 2,6-dimethylaniline (3.33 g, 0.0275 mole) followed by a catalytic amount of potassium iodide (20 mg). The reaction mixture is heated at about 120° for 48 hours, and then poured into ice-water (20 ml) and 2 N sulfuric acid (10 ml) and extracted with ether (3×30 ml). The combined ether extracts are washed with water (2×20 ml) until neutral and with brine (10 ml) followed by drying over calcium sulfate. The reaction product is concentrated under vacuum and isolated by preparative TLC to give m-phenoxybenzyl ester of N-(2,6-dimethylphenyl)valine. MS m/e 403.2 (M+, 7.5).

1. temperatureThe reaction mixture is heated at about 120° for 48 hours
2. extractionextracted with ether (3×30 ml)
3. washThe combined ether extracts are washed with water (2×20 ml) until neutral and with brine (10 ml)
4. dry with materialby drying over calcium sulfate
5. concentrationThe reaction product is concentrated under vacuum
6. customisolated by preparative TLC