Dimethylformamide → 4-Aminopyridine-2-carbonitrile

HRID 272685

반응식

HRID 272685 반응식
Cl[C:2]1[CH:7]=[C:6]([NH2:8])[CH:5]=[CH:4][N:3]=1.[CH3:9][N:10](C=O)C>[C-]#N.[C-]#N.[Zn+2].C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:8][C:6]1[CH:5]=[CH:4][N:3]=[C:2]([C:9]#[N:10])[CH:7]=1

참가 물질

5

반응물 2

HCID 6228DimethylformamideHCID 844322-Chloropyridin-4-amine

생성물 1

HCID 231314544-Aminopyridine-2-carbonitrile수율 20%

시약·촉매·용매 2

HCID 11186Zinc cyanide (Zn(CN)2)촉매HCID 178418397HCID 178418397, 화합물촉매

반응 조건

온도
145 °C

실험 절차

A mixture of 2-chloro-pyridin-4-ylamine (0.642 g, 5 mmol), Zn(CN)2 (0.323 g, 2.75 mmol) and Pd(PPh3)4 (0.288 g, 0.025 mmol) in 5 mL of DMF was heated at 145° C. for 20 hours. After the reaction mixture cooled to room temperature, it was partitioned between ethyl acetate and H2O. The aqueous layer was extracted with additional ethyl acetate. The combined organic layers were washed with brine, dried (MgSO4), filtered, and concentrated under vacuum. The residue was purified by flash column chromatography on silica gel with 9:1 hexanes/ethyl acetate to provide 0.29 g (20%) of the desired product. MS (DCI) m/e 120 (M+H)+; 1H NMR (300 MHz, DMSO-d6) δ 8.08 (d, J=5.76 Hz, 1H), 6.94 (d, J=2.34 Hz, 1H), 6.68 (dd, J=5.76, 2.37 Hz, 1H), 6.59 (s, 2H).

후처리

  1. temperatureAfter the reaction mixture cooled to room temperature
  2. customit was partitioned between ethyl acetate and H2O
  3. extractionThe aqueous layer was extracted with additional ethyl acetate
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried (MgSO4)
  6. filtrationfiltered
  7. concentrationconcentrated under vacuum
  8. customThe residue was purified by flash column chromatography on silica gel with 9:1 hexanes/ethyl acetate

출처 및 근거

ORD 기록
ord-1ad6cbe210044a6989ad4d2dcdaa3449
출처 데이터셋
uspto-grants-2008_11
특허 번호
US07456169B2

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