Salicylic Acid → N-(2-chloro-4-nitrophenyl)-2 hydroxybenzamide

HRID 1509833

반응식

HRID 1509833 반응식
[C:1]([OH:10])(=O)[C:2]1[C:3](=[CH:5][CH:6]=[CH:7][CH:8]=1)[OH:4].[Cl:11][C:12]1[CH:18]=[C:17]([N+:19]([O-:21])=[O:20])[CH:16]=[CH:15][C:13]=1[NH2:14].P(Cl)(Cl)Cl.ClCCl>>[Cl:11][C:12]1[CH:18]=[C:17]([N+:19]([O-:21])=[O:20])[CH:16]=[CH:15][C:13]=1[NH:14][C:1](=[O:10])[C:2]1[CH:8]=[CH:7][CH:6]=[CH:5][C:3]=1[OH:4]

참가 물질

5

반응물 4

HCID 338Salicylic AcidHCID 6344DichloromethaneHCID 84922-Chloro-4-nitroanilineHCID 24387Phosphorus trichloride

생성물 1

HCID 2844786N-(2-chloro-4-nitrophenyl)-2 hydroxybenzamide

반응 조건

온도
137 °C

실험 절차

The method disclosed in U.S. Pat. No. 3,079,297 to Shraufstatter et al with minor variations was utilized. A boiling solution of salicylic acid (1.03 g, 7.46 mmol) and 2-chloro-4-nitroaniline (1.29 g, 7.46 mmol) in xylenes (20 mL) was treated dropwise with a solution of phosphorous trichloride in dichloromethane 2.0M, 1.50 mL, 0.40 equiv.), and the resulting solution was refluxed (137° C.) for four hours. The solution was cooled to about 125° C. An oily residue covered the bottom and sides of the reaction vessel. The hot reaction solution was transferred by glass pipette to a beaker and was allowed to cool to room temperature while being stirred rapidly. The product separated, was collected by filtration, and washed with hexanes, then recrystallized from ethanol. The title compound was obtained, MP 218-220° C. (dec.). 1HNMR (500 MHz, DMSO-d6): δ 7.02 (m, 1H, H3), 7.07 (m, 1H, H5), 7.49 (m, 1H, H4), 8.04 (m, 1H, H6), 8.28 (m, 1H, H5′), 8.41 (m, 1H, H3′), 8.85 (m, 1H, H6′), 11.8 (s, 1H, NH), 12.34 (s, 1H, OH).

후처리

  1. temperatureThe solution was cooled to about 125° C
  2. temperatureto cool to room temperature
  3. customThe product separated
  4. filtrationwas collected by filtration
  5. washwashed with hexanes
  6. customrecrystallized from ethanol

출처 및 근거

ORD 기록
ord-f7371c5d6ddf4995b96f3264db1f0942
출처 데이터셋
uspto-grants-2012_07
특허 번호
US08211882B2

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