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1-Piperazinecarboxylic acid, ethyl ester → 9-Bromo-6-(4-ethoxycarbonyl-1-piperazinyl)-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine

HRID 4070
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인쇄 미리보기

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HRID 4070 반응식
[Br:1][C:2]1[CH:19]=[CH:18][C:5]2[N:6]3[CH2:17][CH2:16][C:15]4[C:7]3=[C:8]([CH:12]=[CH:13][CH:14]=4)[C:9](=O)[NH:10][C:4]=2[CH:3]=1.[CH3:20][CH2:21][O:22][C:23]([N:25]1[CH2:30][CH2:29][NH:28][CH2:27][CH2:26]1)=[O:24].[OH-].[Na+]>[Ti](Cl)(Cl)(Cl)Cl.C1(C)C=CC=CC=1>[Br:1][C:2]1[CH:19]=[CH:18][C:5]2[N:6]3[CH2:17][CH2:16][C:15]4[C:7]3=[C:8]([CH:12]=[CH:13][CH:14]=4)[C:9]([N:28]3[CH2:27][CH2:26][N:25]([C:23]([O:22][CH2:21][CH3:20])=[O:24])[CH2:30][CH2:29]3)=[N:10][C:4]=2[CH:3]=1
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참가 물질

6

반응물 3

HCID 84311-Piperazinecarboxylic acid, ethyl esterHCID 14798Sodium HydroxideHCID 138232839-Bromo-1,2dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine-6-one

생성물 1

HCID 138232999-Bromo-6-(4-ethoxycarbonyl-1-piperazinyl)-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine

시약·촉매·용매 2

HCID 24193Titanium Tetrachloride촉매
HCID 1140
Toluene
용매

실험 절차

A stirred mixture of 7.88 g (0.025 mole) of 9-bromo-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine-6-one and 1200 ml toluene was heated under nitrogen until a solution resulted. Then there was added 39.6 g (0.250 mole) of ethyl N-piperazinocarboxylate followed by 14.2 g (0.075 mole) of titanium tetrachloride. The mixture was heated under reflux for three hours, cooled to room temperature and treated with 500 ml of 2N sodium hydroxide solution. After stirring vigorously for 15 minutes, the layers were separated. The aqueous phase was extracted with 300 ml of toluene. The toluene layers were combined, washed once with 2N sodium hydroxide solution, twice with water, dried over anhydrous sodium sulfate, and concentrated in vacuo. The residue was taken up in 25 ml of hot methanol from which 8.5 g (75%) of product crystallized. Recrystallization from ethyl acetate gave the analytical sample, mp 128°-131° C.

후처리

  1. temperaturewas heated under nitrogen until a solution
  2. customresulted
  3. temperatureThe mixture was heated
  4. temperatureunder reflux for three hours
  5. customthe layers were separated
  6. extractionThe aqueous phase was extracted with 300 ml of toluene
  7. washwashed once with 2N sodium hydroxide solution, twice with water
  8. dry with materialdried over anhydrous sodium sulfate
  9. concentrationconcentrated in vacuo
  10. customcrystallized
  11. customRecrystallization from ethyl acetate
  12. customgave the analytical sample, mp 128°-131° C.

출처 및 근거

ORD 기록
ord-1ad10de5b78b4bdf9211708118c4d309
출처 데이터셋
uspto-grants-1988_02
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US04723003

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