2-Amino-4-(trifluoromethyl)phenol → N-(4-Bromo-2-fluorophenyl)-5-(trifluoromethyl)-1,3-benzoxazol-2-amine

HRID 30906노트

반응식

HRID 30906 반응식
[NH2:1][C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[OH:12].[Br:13][C:14]1[CH:19]=[CH:18][C:17]([N:20]=[C:21]=S)=[C:16]([F:23])[CH:15]=1.Cl.CN(C)CCCN=C=NCC>C(O)C>[Br:13][C:14]1[CH:19]=[CH:18][C:17]([NH:20][C:21]2[O:12][C:3]3[CH:4]=[CH:5][C:6]([C:8]([F:9])([F:10])[F:11])=[CH:7][C:2]=3[N:1]=2)=[C:16]([F:23])[CH:15]=1

참가 물질

5

반응물 3

HCID 1202462-Amino-4-(trifluoromethyl)phenolHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27570034-Bromo-2-fluorophenylisothiocyanate

생성물 1

HCID 23549343N-(4-Bromo-2-fluorophenyl)-5-(trifluoromethyl)-1,3-benzoxazol-2-amine수율 18%

시약·촉매·용매 1

HCID 702Ethanol용매

실험 절차

2-Amino-4-(trifluoromethyl)phenol (580 mg, 3.25 mmol) and 4-bromo-2-fluoro-1-isothio-cyanatobenzene (750 mg, 3.25 mmol) were stirred in ethyl alcohol at ambient temperature for 18 h. The flask was charged with 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (EDCI) (405 mg, 2.12 mmol), and the mixture was stirred for 2 h before being heated at reflux overnight. The reaction was allowed to cool to rt and was concentrated under reduced pressure. The residue was dissolved in ethyl acetate and washed with 2 N aqueous hydrochloric acid solution and water, dried (Na2SO4), and concentrated in vacuo. The crude material was suspended in ether, sonicated, and the resulting solid was collected by filtration to provide the title compound (214 mg, 18%). LC-MS m/z 375.1 (MH+), retention time 3.70 minutes.

후처리

  1. temperaturebefore being heated
  2. temperatureat reflux overnight
  3. concentrationwas concentrated under reduced pressure
  4. dissolutionThe residue was dissolved in ethyl acetate
  5. washwashed with 2 N aqueous hydrochloric acid solution and water
  6. dry with materialdried (Na2SO4)
  7. concentrationconcentrated in vacuo
  8. customsonicated
  9. filtrationthe resulting solid was collected by filtration

출처 및 근거

ORD 기록
ord-bbd0f4f801c04a91ae85780ff3f1de61
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07423156B2

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