Phosphorus oxychloride → 2,5-Dichloropyrido[3,4-b]pyrazine

HRID 930444

반응식

HRID 930444 반응식
[Cl:1][C:2]1[C:7]2[N:8]=[CH:9][C:10](=O)[NH:11][C:6]=2[CH:5]=[CH:4][N:3]=1.P(Cl)(Cl)([Cl:15])=O>>[Cl:15][C:10]1[N:11]=[C:6]2[CH:5]=[CH:4][N:3]=[C:2]([Cl:1])[C:7]2=[N:8][CH:9]=1

참가 물질

3

반응물 2

HCID 24813Phosphorus oxychlorideHCID 867157425-Chloropyrido[3,4-b]pyrazin-2(1H)-one

생성물 1

HCID 867157432,5-Dichloropyrido[3,4-b]pyrazine수율 92.4%

반응 조건

온도
110 °C

실험 절차

A suspension of 5-chloropyrido[3,4-b]pyrazin-2(1H)-one (0.57 g, 3.14 mmol) in phosphorus oxychloride (10.24 mL, 110 mmol) was stirred at 110° C. for two hours, and then concentrated. The residue was dissolved in DCM, washed with saturated sodium bicarbonate, dried over anhydrous sodium sulfate, filtered, and concentrated to afford the title compound (580 mg, 2.90 mmol). MS m/z=200 (M+H).

후처리

  1. concentrationconcentrated
  2. dissolutionThe residue was dissolved in DCM
  3. washwashed with saturated sodium bicarbonate
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated

출처 및 근거

ORD 기록
ord-cadff68031f84708a62f698751562d34
출처 데이터셋
uspto-grants-2016_03
특허 번호
US09296734B2

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