Allyl bromide → 4-[10,11-dihydro-5-(2-propenyl)-5H-dibenzo[a,d]cyclohepten-5-yl]-1-methyl-1,2,5,6-tetrahydropyridine

HRID 2294064ノート

反応式

HRID 2294064 の反応式
[CH:1]1[C:11]2[CH2:10][CH2:9][C:8]3[CH:12]=[CH:13][CH:14]=[CH:15][C:7]=3[C:6](=[C:16]3[CH2:21][CH2:20][N:19]([CH3:22])[CH2:18][CH2:17]3)[C:5]=2[CH:4]=[CH:3][CH:2]=1.[CH2:23]([Li])[CH2:24][CH2:25]C.C(Br)C=C>C1COCC1>[CH2:25]([C:6]1([C:16]2[CH2:17][CH2:18][N:19]([CH3:22])[CH2:20][CH:21]=2)[C:7]2[CH:15]=[CH:14][CH:13]=[CH:12][C:8]=2[CH2:9][CH2:10][C:11]2[CH:1]=[CH:2][CH:3]=[CH:4][C:5]1=2)[CH:24]=[CH2:23]

参加物

5

反応物 3

HCID 7841Allyl bromideHCID 1688974-(10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene)-1-methylpiperidineHCID 178418339Butyllithium

生成物 1

HCID 97975634-[10,11-dihydro-5-(2-propenyl)-5H-dibenzo[a,d]cyclohepten-5-yl]-1-methyl-1,2,5,6-tetrahydropyridine収率 70.2%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
-78 °C

実験手順

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 5:95:0.1 MeOH: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.

後処理

  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 5:95:0.1 MeOH
  10. customevaporated

出典と根拠

ORDレコード
ord-8db5e3fec9454bdc82326235627bc8f4
出典データセット
uspto-grants-1997_11
特許番号
US05688805

反応ノート

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