反应详情

Ethylisothiocyanate (0.35 g, 3.98 mmol) was added to a solution of 2-propionyl-3-hydroxy-5-(3-amino-2,4,6-trimethylphenyl)cyclohex-2-en-1-one (1.0 g, 3.32 mmol) in ethanol (5 ml). Stirring was continued at 20° for 4 days. Dilute acid and methylene chloride were added. The organic layer was washed with water, dried over anhydrous magnesium sulfate and concentrated. The crude product was purified by chromatography on silica gel (elution with an increasing gradient of methanol in methylene chloride) to yield 2-propionyl-3-hydroxy-5-(3-ethylthioureido-2,4,6-trimethylphenyl)cyclohex-2-en-1-one as an oil (0.4 g, 33%). The compound was characterized by proton magnetic resonance spectroscopy (CDCl3, δ in ppm): 1.12 (6H,t); 2.18 (3H,s); 2.28 (3H,s); 2.39 (3H,s); 2.4-4.2 (9H,m); 5.4 (1H,brs); 6.29 (1H,s); 8.34 (1H,brs).

1. additionwere added
2. washThe organic layer was washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated
5. customThe crude product was purified by chromatography on silica gel (
6. washelution with an increasing gradient of methanol in methylene chloride)