Ammonia → 1-(2-Methyl-8-quinolyl)-2,3,4,5-tetramethylcyclopentadiene

HRID 1005644

반응식

HRID 1005644 반응식
Br[C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[C:9]([CH3:12])[CH:8]=[CH:7]2.[Li]CCCC.[CH3:18][C:19]1[C:20](=O)[CH:21]([CH3:26])[CH:22]([CH3:25])[C:23]=1[CH3:24].Cl.N>C1COCC1>[CH3:12][C:9]1[CH:8]=[CH:7][C:6]2[C:11](=[C:2]([C:20]3[CH:19]([CH3:18])[C:23]([CH3:24])=[C:22]([CH3:25])[C:21]=3[CH3:26])[CH:3]=[CH:4][CH:5]=2)[N:10]=1

참가 물질

7

반응물 5

HCID 222AmmoniaHCID 313Hydrochloric AcidHCID 410922,3,4,5-Tetramethyl-2-cyclopentenoneHCID 47150308-Bromo-2-methylquinolineHCID 178418339Butyllithium

생성물 1

HCID 223521291-(2-Methyl-8-quinolyl)-2,3,4,5-tetramethylcyclopentadiene수율 60%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

A solution of 4.4 g of 8-bromo-2-methylquinoline (20 mmol) in 50 ml of THF was cooled to −78° C., and 8.8 ml of n-BuLi (2.5 M in hexane, 22 mmol) were added dropwise with stirring. After the mixture had been stirred for 10 minutes, 3.5 g of 2,3,4,5-tetramethylcyclopentenone (25 mmol) were added dropwise, and the solution was warmed to room temperature, refluxed for one hour and cooled. Ice and hydrochloric acid were added to about pH 1, the mixture was neutralized using ammonia solution, the phases were separated, and the aqueous phase was extracted with pentane. After the combined organic extracts had been dried, the pentane was removed under reduced pressure, and the brown oil which remained was distilled under a high vacuum (b.p.: 115° C./0.01 mbar). 1-(2-Methyl-8-quinolyl)-2,3,4,5-tetramethylcyclopentadiene was obtained as a yellow, viscous oil in a yield of 60% (3.2 g).

후처리

  1. stirringAfter the mixture had been stirred for 10 minutes
  2. temperaturerefluxed for one hour
  3. temperaturecooled
  4. customthe phases were separated
  5. extractionthe aqueous phase was extracted with pentane
  6. customAfter the combined organic extracts had been dried
  7. customthe pentane was removed under reduced pressure
  8. distillationthe brown oil which remained was distilled under a high vacuum (b.p.: 115° C./0.01 mbar)

출처 및 근거

ORD 기록
ord-58ea28ea58cd4b3d836b70d6a39e56bb
출처 데이터셋
uspto-grants-2004_09
특허 번호
US06787498B2

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