反应详情

温度

-78 °C

Dissolved 4-(10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene)-1-methylpiperidine (10 g, 34.6 mmol) in 200 mL of dry THF, and cooled to -78° C. under a nitrogen atmosphere. Added n-butyl lithium (15.2 mL of 2.5M in hexane, 38.0 mmol) dropwise via syringe. Warmed to 0° C, and stirred for 60 mins. Recooled to -78° C, and added allyl bromide (4.6 g, 3.3 mL, 38.0 mmol) dropwise via syringe. Warmed to room temperature slowly, and stirred for 5 hours. Added saturated NH4Cl, and extracted with ether. Dried the combined organic extracts with MgSO4, filtered, and evaporated. Purified the crude product by flash chromatography on silica gel eluting with 5:95:0.1MeOH:EtOAc:NH4OH. Combined appropriate fractions, and evaporated to give 8.0 g (70% yield) of 4-[10,11-dihydro-5-(2-propenyl)-5H-dibenzo[a,d]cyclohepten-5-yl]-1-methyl-1,2,5,6-tetrahydropyridine as an oil. Dissolved free base in ether, and added 19 weight % HCl-EtOH until acidic. Added additional ether, and let stand to precipitate hydrochloride salt. Recrystallized salt from acetonitrile-ether.

1. temperatureWarmed to 0° C
2. customRecooled to -78° C
3. temperatureWarmed to room temperature slowly
4. stirringstirred for 5 hours
5. extractionAdded saturated NH4Cl, and extracted with ether
6. dry with materialDried the combined organic extracts with MgSO4
7. filtrationfiltered
8. customevaporated
9. customPurified the crude product by flash chromatography on silica gel eluting with 5:95:0.1MeOH
10. customevaporated