反应详情

To a stirred solution of (S)-3-phenylpropane-1,2-diamine (0.37 g, 2.48 mmol) in toluene (20 mL) at 0° C. under nitrogen atmosphere was added dropwise trimethylaluminum (1.24 mL of 2.0 M solution in toluene, 2.48 mmol). When the fuming ceased, ethyl 5-(3-(4-fluorobenzyl)-2-oxoimidazolidin-1-yl)-3-methylthiophene-2-carboxylate (0.60 g, 1.66 mmol) in toluene (5 mL) was added slowly. The resulting mixture was stirred at reflux for 18 h, cooled to ambient temperature and partitioned between ethyl acetate (75 mL) and water (50 mL). The aqueous layer was extracted with ethyl acetate (3×75 mL), and the combined organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluted with dichloromethane/methanol/triethyl amine (9/1/0.1) to afford the title compound as brown viscous oil in 29% yield (0.06 g): MS (ES+) m/z 449.2 (M+1).

1. temperatureat reflux for 18 h
2. custompartitioned between ethyl acetate (75 mL) and water (50 mL)
3. extractionThe aqueous layer was extracted with ethyl acetate (3×75 mL)
4. dry with materialthe combined organic layer was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by column chromatography
8. washeluted with dichloromethane/methanol/triethyl amine (9/1/0.1)