Isatoic Anhydride → 2-amino-benzoic acid N'-pyridin-2-yl-hydrazide

HRID 1723840

반응식

HRID 1723840 반응식
[C:1]12[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=1)[NH:6]C(=O)[O:4][C:2]2=O.[NH:13]([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][N:16]=1)[NH2:14]>CCO>[N:16]1[CH:17]=[CH:18][CH:19]=[CH:20][C:15]=1[NH:13][NH:14][C:2](=[O:4])[C:1]1[CH:11]=[CH:10][CH:9]=[CH:8][C:7]=1[NH2:6]

참가 물질

4

반응물 2

HCID 8359Isatoic AnhydrideHCID 786452-Hydrazinopyridine

생성물 1

HCID 685335622-amino-benzoic acid N'-pyridin-2-yl-hydrazide수율 546.1%

시약·촉매·용매 1

HCID 702Ethanol용매

실험 절차

A mixture of isatoic anhydride (3.51 g, 2.15 mmol) and 2-hydrazinopyridine (2.40 g, 2.20 mmol) in 35 ml of EtOH was refluxed for 17 hours. After refluxing for 15 minutes, the suspension turned into a brown solution and gas evolution was observed. At the end of the 17 hour period, the reaction mixture was cooled to room temperature and the brown solution was concentrated on a rotary evaporator. The residue was chromatographed on silica gel with 65% EtOAc in hexanes. The fractions containing the product were collected and concentrated. The solid was triturated with ether (100 ml) for 15 minutes and collected by filtration. It was air-dried to give 2.68 g of 2-amino-benzoic acid N′-pyridin-2-yl-hydrazide (Intermediate 9) as a white solid. MS (APCI): 229 (M+1, 100%).

후처리

  1. temperaturewas refluxed for 17 hours
  2. temperatureAfter refluxing for 15 minutes
  3. concentrationthe brown solution was concentrated on a rotary evaporator
  4. customThe residue was chromatographed on silica gel with 65% EtOAc in hexanes
  5. additionThe fractions containing the product
  6. customwere collected
  7. concentrationconcentrated
  8. customThe solid was triturated with ether (100 ml) for 15 minutes
  9. filtrationcollected by filtration
  10. customIt was air-dried

출처 및 근거

ORD 기록
ord-83e33b4730b54bbe97fd501c677cf911
출처 데이터셋
uspto-grants-2009_02
특허 번호
US07485636B2

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