Acetic Acid → 5-(4-Fluoro-phenyl)-3-isopropylamino-thiophene-2-carboxylic acid methyl ester

HRID 749340

반응식

HRID 749340 반응식
[CH3:1][O:2][C:3]([C:5]1[S:6][C:7]([C:11]2[CH:16]=[CH:15][C:14]([F:17])=[CH:13][CH:12]=2)=[CH:8][C:9]=1[NH2:10])=[O:4].CO[C:20]([CH3:22])=[CH2:21].CC(O)=O.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C([O-])(O)=O.[Na+]>ClCCCl.CCOC(C)=O.O>[CH3:1][O:2][C:3]([C:5]1[S:6][C:7]([C:11]2[CH:16]=[CH:15][C:14]([F:17])=[CH:13][CH:12]=2)=[CH:8][C:9]=1[NH:10][CH:20]([CH3:22])[CH3:21])=[O:4]

참가 물질

9

반응물 5

HCID 176Acetic AcidHCID 83002-MethoxypropeneHCID 516892Sodium BicarbonateHCID 619692Methyl 3-amino-5-(4-fluorophenyl)thiophene-2-carboxylateHCID 5049666Sodium triacetoxyborohydride

생성물 1

HCID 597523015-(4-Fluoro-phenyl)-3-isopropylamino-thiophene-2-carboxylic acid methyl ester수율 91%

시약·촉매·용매 3

HCID 111,2-Dichloroethane용매HCID 962Water용매HCID 8857Ethyl Acetate용매

실험 절차

To a stirred solution of 3-Amino-5-(4-fluoro-phenyl)-thiophene-2-carboxylic acid methyl ester (500 mg, 2.0 mmol) in 1,2-dichloroethane (10 mL) was added sequentially 2-methoxypropene (0.76 mL, 8.0 mmol), AcOH (0.12 mL, 4.0 mmol) and NaBH(OAc)3 (0.848 mg, 8.0 mmol) and stirred for 16 h. It was then diluted with EtOAc and H2O. The aqueous solution was adjusted to pH=7 by adding NaHCO3. The aqueous phase was extracted with EtOAc, the combined extract was washed with brine and dried on MgSO4 and filtered. Purification on bond elute with hexane to 5% EtOAc-hexane furnished 5-(4-Fluoro-phenyl)-3-isopropylamino-thiophene-2-carboxylic acid methyl ester (0.530 mg, 91% yield). 1H NMR (CDCl3, 400 MHz): δ 7.62 (d, 2H), 7.09 (m, 2H), 6.81 (s, 1H), 3.84 (s, 3H), 3.71 (m, 1H), 1.35 (d, 6H).

후처리

  1. extractionThe aqueous phase was extracted with EtOAc
  2. extractionthe combined extract
  3. washwas washed with brine
  4. customdried on MgSO4
  5. filtrationfiltered
  6. customPurification on bond
  7. washelute with hexane to 5% EtOAc-hexane

출처 및 근거

ORD 기록
ord-325ad75748e94949924704eea259da0a
출처 데이터셋
uspto-grants-2008_07
특허 번호
US07402608B2

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