反应详情

温度

80 °C

A mixture of 1-(1,2,3,4-tetrahydronaphthalen-2-yl)-1,3-dihydroimidazole-2-thione (1.3 g, 5.6 mmol), prepared as in Example 9, and ethyl acrylate (3.1 mL, 28.2 mmol) in 14 mL of ethanol and 1.28 mL of N-benzyltrimethylammonium hydroxide (2.8 mmol) in methanol was heated at 80° C. under nitrogen for 2 hours. The mixture was allowed to cool and concentrated by rotoevaporation. The residue was purified by chromatography on silica gel eluting with hexanes/ethyl acetate (3:1) to give ethyl 3-[3-(1,2,3,4-tetrahydronaphthalen-2-yl)-2-thioxo-2,3-dihydro-1H-imidazol-1-yl]propionate (1.2 g, 3.7 mmol), m.p. 71°-73° C.

1. temperatureto cool
2. concentrationconcentrated by rotoevaporation
3. customThe residue was purified by chromatography on silica gel eluting with hexanes/ethyl acetate (3:1)