反应详情

温度

100 °C

Heat a mixture of 4-(3-bromo-phenoxy)-cis-2-methyl-piperidine-1-carboxylic acid tert-butyl ester isomer 2 (preparation 23, 0.759 g), benzhydrylideneamine (0.446 g), racemic-2,2′-bis(diphenylphosphino)-1,1′ binaphthyl (50 mg) and sodium t-butoxide (0.269 g) in toluene (20 mL) at 100° C. After 10 min., add tris(dibenzylidineacetone)-dipalladium(0) (37 mg) and heat at 100° C. After 2.5 hr., partition between ethyl acetate-hexane (1:4) and saturated aqueous NaCl, dry over anhydrous sodium sulfate, evaporate and purify on a 35 g silica gel column eluting with dichloromethane-2M NH3 in methanol gradient to give the crude title compound (0.74 g). Mass spectrum (electrospray) m/z 471 (M+1).

1. temperatureHeat
2. waitAfter 2.5 hr
3. custom, partition between ethyl acetate-hexane (1:4) and saturated aqueous NaCl
4. dry with materialdry over anhydrous sodium sulfate
5. customevaporate
6. custompurify on a 35 g silica gel column
7. washeluting with dichloromethane-2M NH3 in methanol gradient