Sodium Iodide → 4-[2-(3,4-Dimethoxy-phenyl)-ethyl]-piperazine-1-carboxylic acid t-butyl ester

HRID 655598

반응식

HRID 655598 반응식
Cl[CH2:2][CH2:3][C:4]1[CH:9]=[CH:8][C:7]([O:10][CH3:11])=[C:6]([O:12][CH3:13])[CH:5]=1.[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1)=[O:20])([CH3:17])([CH3:16])[CH3:15].C([O-])([O-])=O.[K+].[K+].[Na+].[I-]>CN(C=O)C>[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][N:24]([CH2:2][CH2:3][C:4]2[CH:9]=[CH:8][C:7]([O:10][CH3:11])=[C:6]([O:12][CH3:13])[CH:5]=2)[CH2:23][CH2:22]1)=[O:20])([CH3:17])([CH3:15])[CH3:16]

참가 물질

6

반응물 4

HCID 5238Sodium IodideHCID 11430Potassium CarbonateHCID 143452tert-Butyl piperazine-1-carboxylateHCID 30153594-(2-Chloroethyl)-1,2-dimethoxybenzene

생성물 1

HCID 669957854-[2-(3,4-Dimethoxy-phenyl)-ethyl]-piperazine-1-carboxylic acid t-butyl ester수율 76.5%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

반응 조건

온도
80 °C

실험 절차

A reaction mixture of 4-(2-chloroethyl)-1,2-dimethoxybenzene (3.6 g, 17.9 mmol), piperazine-1-carboxylic acid t-butyl ester (4.0 g, 21.5 mmol), K2CO3 (4.97 g, 36 mmol), and NaI (2.7 g, 18 mmol) in DMF (20 mL) was stirred at 80° C. for 3 h, cooled to room temperature, and partitioned between water and ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous sodium sulfate, and concentrated. The residue was purified by column chromatography to afford 4-[2-(3,4-dimethoxy-phenyl)-ethyl]-piperazine-1-carboxylic acid t-butyl ester (4.8 g, 76%) which was dissolved in 4 N HCl in dioxane. This solution was stirred at room temperature for 4 h, concentrated, and dried in a high vacuum oven to give the title compound quantitatively.

후처리

  1. temperaturecooled to room temperature
  2. custompartitioned between water and ethyl acetate
  3. washThe organic layer was washed with water and brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated
  6. customThe residue was purified by column chromatography

출처 및 근거

ORD 기록
ord-5f9829d032d24b5a9f7bd5cfe5515bc6
출처 데이터셋
uspto-grants-2011_12
특허 번호
US08071602B2

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