Trifluoroacetic acid → 2-(Benzyloxy)-5-nitroaniline

HRID 2274270노트

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HRID 2274270 반응식
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([N+:15]([O-:17])=[O:16])=[CH:11][C:10]=1[NH:18]C(=O)OC(C)(C)C)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.FC(F)(F)C(O)=O.CCCCCC.C(OCC)(=O)C>C(Cl)Cl>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([N+:15]([O-:17])=[O:16])=[CH:11][C:10]=1[NH2:18])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

5

반응물 3

HCID 6422Trifluoroacetic acidHCID 21226206Ethyl acetate hexaneHCID 86724342Tert-butyl (2-(benzyloxy)-5-nitrophenyl)carbamate

생성물 1

HCID 2646032-(Benzyloxy)-5-nitroaniline수율 98.7%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

반응 조건

온도
0 °C

실험 절차

To a solution of tert-butyl (2-(benzyloxy)-5-nitrophenyl)carbamate (1.0 g) in DCM (10 mL), cooled to 0° C., was added trifluoroacetic acid (5.0 mL). The reaction mixture was stirred at 0° C. for 15 minutes and then at room temperature for 30 minutes. The reaction was monitored by TLC using hexane:ethyl acetate (3:7) as mobile phase. After completion, the reaction mixture was quenched in water and neutralized with sodium bicarbonate. Product was extracted into DCM. The organic layer was washed with brine, dried over sodium sulfate and concentrated completely under reduce pressure at 40° C. Crude material was purified by trituration with diethyl ether to give 0.7 g of 2-(benzyloxy)-5-nitroaniline. 1H NMR: DMSO-d6 (400 MHz): 5.26 (s, 2H), 5.44 (s, 2H), 7.04 (d, 1H, J=8.8), 7.34 (m, 1H), 7.45 (m, 3H), 7.50 (s, 1H), 7.520 (d, 2H, J=2.8).

후처리

  1. waitat room temperature for 30 minutes
  2. customAfter completion, the reaction mixture was quenched in water and neutralized with sodium bicarbonate
  3. extractionProduct was extracted into DCM
  4. washThe organic layer was washed with brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated completely
  7. customat 40° C
  8. customCrude material was purified by trituration with diethyl ether

출처 및 근거

ORD 기록
ord-62b74d0e0b8641c084ce22d28188c036
출처 데이터셋
uspto-grants-2015_09
특허 번호
US09126950B2

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