Sulfuric Acid → 3-Chloro-2-cyanopyrazine 1-oxide

HRID 442768

반응식

HRID 442768 반응식
[Cl:1][C:2]1[C:7]([C:8]#[N:9])=[N:6][CH:5]=[CH:4][N:3]=1.[OH:10]S(O)(=O)=O>>[Cl:1][C:2]1[C:7]([C:8]#[N:9])=[N+:6]([O-:10])[CH:5]=[CH:4][N:3]=1

참가 물질

3

반응물 2

HCID 1118Sulfuric AcidHCID 2924653-Chloropyrazine-2-carbonitrile

생성물 1

HCID 107969923-Chloro-2-cyanopyrazine 1-oxide수율 36%

반응 조건

온도
0 °C

실험 절차

2-Chloro-3-cyanopyrazine (5.00 g, 35.94 mmol) was dissolved in 35 ml concentrated H2SO4 under nitrogen and cooled to 0° C. To this was added 11.65 g (43.95 mmol) K2S2O8 portionwise. The flask was fitted with a CaCl2 drying tube, the reaction mixture allowed to warm to rt and stir for 24 h. After partitioning between CHCl3 and ice water, the separated aqueous phase was extracted with CHCl3. The combined organics were washed with water, saturated NaHCO3, brine and dried over MgSO4. Concentration gave 2.01 g (36%) of the title compound as an off-white solid. 1H NMR (300 MHz, CDCl3) δ 8.12 (d, 1H), 8.38 (d, 1H). MS (DCI/NH3) m/e 173 (M+NH4)+.

후처리

  1. customThe flask was fitted with a CaCl2 drying tube
  2. temperatureto warm to rt
  3. customAfter partitioning between CHCl3 and ice water
  4. extractionthe separated aqueous phase was extracted with CHCl3
  5. washThe combined organics were washed with water, saturated NaHCO3, brine
  6. dry with materialdried over MgSO4
  7. concentrationConcentration

출처 및 근거

ORD 기록
ord-4ded9e7e08db400b861adc9b0df950b9
출처 데이터셋
uspto-grants-1999_04
특허 번호
US05891882

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