反应详情

温度

150 °C

To a solution of ethyl 3-(chloromethyl)-2-methyl-2-(3-nitrophenyl)cyclopropane carboxylate (Preparation 5, 14.4 g, 48.6 mmol), in N,N-dimethylformamide (120 ml) was added sodium hydrogen carbonate (12 g, 143 mmol) and 3-phenylpropylamine (38.8 g, 41 ml, 290 mmol). The mixture was heated to 150° C. for 7 h, then cooled to room temperature and poured onto water (1000 ml). The mixture was extracted with diethyl ether (2×500 ml), and the combined extracts were washed with water (2×250 ml), dried (Na2SO4), filtered and concentrated in vacuo. The residue was purified by silica (1000 g) column chromatography eluting with dichloromethane then dichloromethane/ethyl acetate 4:1. Product-containing fractions were combined and concentrated in vacuo to give the title compound as a very pale yellow oil (6.2 g, 36%).

1. temperaturecooled to room temperature
2. additionpoured onto water (1000 ml)
3. extractionThe mixture was extracted with diethyl ether (2×500 ml)
4. washthe combined extracts were washed with water (2×250 ml)
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe residue was purified by silica (1000 g) column chromatography
9. washeluting with dichloromethane
10. concentrationconcentrated in vacuo