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Diisopropylethylamine → 1,1-dimethylethyl (2S)-4-[(3-fluoro-4-nitrophenyl)methyl]-2-methyl-1-piperazinecarboxylate

HRID 534744
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HRID 534744 반응식
Br[CH2:2][C:3]1[CH:8]=[CH:7][C:6]([N+:9]([O-:11])=[O:10])=[C:5]([F:12])[CH:4]=1.CCN(C(C)C)C(C)C.[CH3:22][C@H:23]1[CH2:28][NH:27][CH2:26][CH2:25][N:24]1[C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30]>CN(C=O)C>[F:12][C:5]1[CH:4]=[C:3]([CH2:2][N:27]2[CH2:26][CH2:25][N:24]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[C@@H:23]([CH3:22])[CH2:28]2)[CH:8]=[CH:7][C:6]=1[N+:9]([O-:11])=[O:10]
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참가 물질

5

반응물 3

HCID 81531DiisopropylethylamineHCID 27746613-Fluoro-4-nitrobenzyl bromideHCID 10081508tert-Butyl (2S)-2-methylpiperazine-1-carboxylate

생성물 1

HCID 592621851,1-dimethylethyl (2S)-4-[(3-fluoro-4-nitrophenyl)methyl]-2-methyl-1-piperazinecarboxylate수율 92.5%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매2회

실험 절차

A solution of 4-(bromomethyl)-2-fluoro-1-nitrobenzene (232 mg, 1 mmol) and Hunig's base (0.192 mL, 1.1 mmol) in DMF (3 mL) was treated with 1,1-dimethylethyl (2S)-2-methyl-1-piperazinecarboxylate (200 mg, 1 mmol) in DMF (3 mL) and stirred at room temperature for 20 minutes. The reaction mixture was concentrated, re-dissolved in DCM and washed with water and brine, then dried and concentrated. The crude product was purified by column chromatography. Elution with EtOAc/pentane yielded the title compound as a colourless gum (327 mg). δH (CDCl3, 400 MHz) 8.03 (1H, m), 7.34 (1H, dd), 7.27 (1H, m), 4.22 (1H, br.s), 3.84 (1H, d), 3.58 (1H, d), 3.47 (1H, d), 3.13 (1H, td), 2.72 (1H, m), 2.54 (1H, m), 2.22 (1H, dd), 2.09 (1H, m), 1.46 (9H, s), 1.26 (3H, d) [values corrected for incorrectly referenced TMS at 0.62 ppm on spectrum].

후처리

  1. concentrationThe reaction mixture was concentrated
  2. dissolutionre-dissolved in DCM
  3. washwashed with water and brine
  4. customdried
  5. concentrationconcentrated
  6. customThe crude product was purified by column chromatography
  7. washElution with EtOAc/pentane

출처 및 근거

ORD 기록
ord-48993971b13a48aaa2c00c8ec0d8aa37
출처 데이터셋
uspto-grants-2014_10
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08853218B2

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