Sodium Nitrite → 1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazole-4-carbonyl azide

HRID 2094952

반응식

HRID 2094952 반응식
[N:1]([O-])=O.[Na+].[CH3:5][C:6]1[C:10]([CH2:11][N:12]2[CH:16]=[C:15]([C:17]([NH:19][NH2:20])=[O:18])[CH:14]=[N:13]2)=[C:9]([CH3:21])[O:8][N:7]=1>C(O)(=O)C>[CH3:5][C:6]1[C:10]([CH2:11][N:12]2[CH:16]=[C:15]([C:17]([N:19]=[N+:20]=[N-:1])=[O:18])[CH:14]=[N:13]2)=[C:9]([CH3:21])[O:8][N:7]=1

참가 물질

4

반응물 2

HCID 23668193Sodium NitriteHCID 579449511-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazole-4-carbohydrazide

생성물 1

HCID 574224251-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazole-4-carbonyl azide수율 94.4%

시약·촉매·용매 1

HCID 176Acetic Acid용매

반응 조건

온도
0 °C

실험 절차

Sodium nitrite (450 mg, 6.5 mmol, in H2O) (10 mL) was added dropwise, over 10 minutes, to a suspension of 1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazole-4-carbohydrazide (example 10-1b) (1 g, 4.3 mmol) in 10% aqueous acetic acid (50 mL) and cooled to 0° C. via an ice water bath. The reaction was stirred for an additional 15 minutes then extracted with ethyl acetate (3×, 75 mL). The combined organic extracts were washed with aqueous saturated sodium carbonate (100 mL) followed by H2O (100 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated. The solid product was triturated with ethyl acetate/hexanes (1/9) and dried en vacuo to afford 1-((3,5-dimethylisoxazol-4-yl)methyl)-1H-pyrazole-4-carbonyl azide (1 g, 93%) as a white solid. 1H NMR (CDCl3, 400 MHz): δ2.20 (s, 3H), 2.44 (s, 3H), 5.07 (s, 2H), 7.81 (s, 1H), 7.93 (s, 1H).

후처리

  1. extractionthen extracted with ethyl acetate (3×, 75 mL)
  2. washThe combined organic extracts were washed with aqueous saturated sodium carbonate (100 mL)
  3. dry with materialThe combined organic extracts were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe solid product was triturated with ethyl acetate/hexanes (1/9)
  7. customdried en vacuo

출처 및 근거

ORD 기록
ord-0de395f19dd0489097335e19b818a320
출처 데이터셋
uspto-grants-2013_05
특허 번호
US08445692B2

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