[4-(4-Nitrophenyl)but-3-ynyl]carbamic acid tert-butyl ester → [4-(4-Aminophenyl)butyl]carbamic acid tert-butyl ester

HRID 254351노트

반응식

HRID 254351 반응식
[C:1]([O:5][C:6](=[O:21])[NH:7][CH2:8][CH2:9][C:10]#[C:11][C:12]1[CH:17]=[CH:16][C:15]([N+:18]([O-])=O)=[CH:14][CH:13]=1)([CH3:4])([CH3:3])[CH3:2]>C(O)C.[Pd]>[C:1]([O:5][C:6](=[O:21])[NH:7][CH2:8][CH2:9][CH2:10][CH2:11][C:12]1[CH:13]=[CH:14][C:15]([NH2:18])=[CH:16][CH:17]=1)([CH3:4])([CH3:2])[CH3:3]

참가 물질

4

반응물 1

HCID 11716220[4-(4-Nitrophenyl)but-3-ynyl]carbamic acid tert-butyl ester

생성물 1

HCID 11558019[4-(4-Aminophenyl)butyl]carbamic acid tert-butyl ester수율 96%

시약·촉매·용매 2

HCID 23938Palladium촉매HCID 702Ethanol용매

실험 절차

To a solution of compound 51 (2.01 g, 6.923 mmol) in ethanol (50 mL) was added 10% palladium on carbon (737 mg, wet) in one portion under argon protection. The flask was evacuated and re-filled with argon three times (to remove oxygen), and the mixture stirred at room temperature overnight under one atmosphere of hydrogen. The reaction system was then purged with nitrogen, and the catalyst was vacuum filtered and washed with ethanol (2×5 mL). The filtrate and washings were combined and concentrated under reduced pressure. The residue was chromatographed over silica gel, eluting with a mixture of ethyl acetate (0-25%) and hexanes (100-75%), to afford 1.75 g (96%) of the product 52 as a colorless viscous oil. 1H NMR (CDCl3) δ 1.44 (s, 9H), 1.47-1.64 (m, 4H), 2.50 (t, J=7.1 Hz, 2H), 3.08-3.14 (m, 2H), 3.57 (br s, 2H), 4.55 (br s, 1H), 6.62 (d, J=8.2 Hz, 2H), 6.95 (d, J=8.2 Hz, 2H). m/z (APCI)=265 [C15H24N2O2+H]+.

후처리

  1. customThe flask was evacuated
  2. additionre-filled with argon three times (to remove oxygen)
  3. customThe reaction system was then purged with nitrogen
  4. filtrationfiltered
  5. washwashed with ethanol (2×5 mL)
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was chromatographed over silica gel
  8. washeluting with a mixture of ethyl acetate (0-25%) and hexanes (100-75%)

출처 및 근거

ORD 기록
ord-c7fc132042f5483d852a66f3cf43d5bc
출처 데이터셋
uspto-grants-2011_01
특허 번호
US07875619B2

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