反应详情

温度

80 °C

A suspension of ethyl 1-benzyl-6-hydroxy-2,3-dihydro-1H-inden-2-ylcarbamate (620 mg, 1.991 mmol) and caesium carbonate (1298 mg, 3.98 mmol) in acetonitrile (15 ml) was stirred at 80° C. under argon for 1 h, cooled down to 50° C. and tert-butyl 2-bromoethylcarbamate (669 mg, 2.99 mmol) dissolved in acetonitrile was slowly added. Stirred at 80° C. for 2 h. Evaporated acetonitrile, re-dissolved in dichloromethane, washed with water, co-extracted aqueous layer twice with dichloromethane and the combined organic layers were dried, filtered and evaporated and purified by flash silica gel chromatography on 40 g SiO2-cartridge using 30% ethyl acetate in cyclohexane to afford the titled compound as a brown oil. m=624 mg

1. temperaturecooled down to 50° C.
2. additionwas slowly added
3. stirringStirred at 80° C. for 2 h
4. washwashed with water, co-extracted aqueous layer twice with dichloromethane
5. customthe combined organic layers were dried
6. filtrationfiltered
7. customevaporated
8. custompurified by flash silica gel chromatography on 40 g SiO2-cartridge