Dimethylformamide → ethyl 8-iodo-7-methoxy-2-(trifluoromethyl)-2H-chromene-3-carboxylate

HRID 855023노트

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HRID 855023 반응식
[OH:1][C:2]1[C:9]([I:10])=[C:8]([O:11][CH3:12])[CH:7]=[CH:6][C:3]=1[CH:4]=O.[F:13][C:14](/[C:17](=C\C)/C(OCC)=O)([F:16])[F:15].C(=O)([O-])[O-].[Cs+].[Cs+].CN(C)C=O.[C:36]([O:39][CH2:40][CH3:41])(=[O:38])[CH3:37]>>[I:10][C:9]1[C:8]([O:11][CH3:12])=[CH:7][CH:6]=[C:3]2[C:2]=1[O:1][CH:17]([C:14]([F:16])([F:15])[F:13])[C:37]([C:36]([O:39][CH2:40][CH3:41])=[O:38])=[CH:4]2

참가 물질

6

반응물 5

HCID 6228DimethylformamideHCID 8857Ethyl AcetateHCID 10796Cesium carbonateHCID 190890572-Hydroxy-3-iodo-4-methoxybenzaldehydeHCID 23051828Ethyl trifluoromethylcrotonate

생성물 1

HCID 58934894ethyl 8-iodo-7-methoxy-2-(trifluoromethyl)-2H-chromene-3-carboxylate수율 14%

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온도
90 °C

실험 절차

To the mixture of 1.5 g (5.4 mmol) of 2-hydroxy-3-iodo-4-methoxybenzaldehyde, 3.1 mL (20.6 mmol) of ethyl trifluoromethylcrotonate, and 4.2 g(12.9 mmol) of cesium carbonate was added 8 mL of anhydrous N,N-dimethylformamide. The mixture was heated to 90° C. overnight. After cooling to room temperature, to the reaction was added 150 mL of ethyl acetate. The organic solution was filtered, washed with brine and dried over anhydrous magnesium sulfate. After removing the volatiles, the residue was purified by silica chromatography with ethyl acetate/hexane (2:8) to give 0.3 g (14%) a light yellow solid: 1H NMR(CDCl3/400 MHz) 7.65(s, 1H), 7.17(d, J=8.4 Hz, 1H), 6.50(d, J=8.4 Hz, 1H), 5.80(q, J=6.8 Hz,1H), 4.30(m, 2H), 3.92(s, 3H), 1.33(t, J=7.6 Hz, 3H). MS (ESI+) 429.0(M+1, 100). HRMS (EI+) m/z calcd for (C14H12F3O4) 427.9732, found 427.9715.

후처리

  1. temperatureAfter cooling to room temperature, to the reaction
  2. filtrationThe organic solution was filtered
  3. washwashed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customAfter removing the volatiles
  6. customthe residue was purified by silica chromatography with ethyl acetate/hexane (2:8)

출처 및 근거

ORD 기록
ord-85b4db35c8b64128bac6b94fbe2ef3c4
출처 데이터셋
uspto-grants-2007_08
특허 번호
US07259266B2

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