Benzimidazole → Benzimidazole, 1-(4-chlorobutyl)-

HRID 1482569

반응식

HRID 1482569 반응식
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[CH:2]1.[OH-].[Na+].[Cl:12][CH2:13][CH2:14][CH2:15][CH2:16]Br>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.ClCCl>[Cl:12][CH2:13][CH2:14][CH2:15][CH2:16][N:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[CH:2]1

참가 물질

6

반응물 3

HCID 5798BenzimidazoleHCID 14798Sodium HydroxideHCID 813641-Bromo-4-chlorobutane

생성물 1

HCID 583170Benzimidazole, 1-(4-chlorobutyl)-수율 60%

시약·촉매·용매 2

HCID 74236Tetrabutylammonium Bromide촉매HCID 6344Dichloromethane용매2회

반응 조건

온도
60 °C

실험 절차

1H-benzimidazole (11.8 g, 0.10 mol) was dissolved into 200 ml of 20% wt. sodium hydroxide, 4-chlorobromobutane (34.3 g, 0.20 mol) and tetrabutyl ammonium bromide (1.0 g) were added, and mixed for 5 min. The mixture was heated to 60° C., stirred to react for 2 hours. Then the reaction solution was cooled down to ambient temperature, 100 ml of dichloromethane was added for extraction and liquid separation. To the aqueous phase, 100 of dichloromethane was added for extraction. Organic phases were mixed, washed with 100 ml of saturated saline. Liquid was separated, and organic phase was evaporated to dryness to produce oily product. Oily products were separated and purified by chromatography with neutral Al2O3 to produce 12.5 g of 1-(4-chlorobutyl)-1H-benzimidazole, with a yield of 60.0%.

후처리

  1. additionwere added
  2. additionmixed for 5 min
  3. customto react for 2 hours
  4. temperatureThen the reaction solution was cooled down to ambient temperature
  5. additionOrganic phases were mixed
  6. washwashed with 100 ml of saturated saline
  7. customLiquid was separated
  8. customorganic phase was evaporated to dryness
  9. customto produce oily product
  10. customOily products were separated
  11. custompurified by chromatography with neutral Al2O3

출처 및 근거

ORD 기록
ord-91c4edff2d464c19b631100a4c5a9ac2
출처 데이터셋
uspto-grants-2016_08
특허 번호
US09415047B2

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