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Iodine → Ethyl 1-[6-(2-hydroxy-3-iodophenyl)pyridin-2-yl]-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate

HRID 1255190
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1255190
[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[N:13]=[C:12]([N:14]2[C:18]([C:19]([F:22])([F:21])[F:20])=[C:17]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:16]=[N:15]2)[CH:11]=[CH:10][CH:9]=1.[I:28]I>CCO.CCOC(C)=O.S([O-])([O-])(=O)=O.[Ag+2]>[OH:1][C:2]1[C:7]([I:28])=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[N:13]=[C:12]([N:14]2[C:18]([C:19]([F:22])([F:21])[F:20])=[C:17]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:16]=[N:15]2)[CH:11]=[CH:10][CH:9]=1
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Komponenten

6

Edukt 2

HCID 807IodineHCID 136298134Ethyl 1-[6-(2-hydroxylphenyl)pyridine-2-yl]-5-trifluoromethyl-1H-pyrazole-4-carboxylate

Produkt 1

HCID 136356801Ethyl 1-[6-(2-hydroxy-3-iodophenyl)pyridin-2-yl]-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418844HCID 178418844, VerbindungKatalysatorHCID 702
Ethanol
Lösungsmittel
HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a suspension of the title compound from Example 1 Step B (2.00 g, 5.30 mmol) and silver sulfate (1.653 g, 5.30 mmol) in EtOH (53 mL) was added iodine (1.35 g, 5.30 mmol). The resulting suspension was stirred vigorously at ambient temperature. After 4 h, the reaction mixture was diluted with EtOAc, and the organic phase was washed successively with water, sat. aq. sodium bisulfate, and sat. aq. NaHCO3. The organic phase was then concentrated in vacuo. The title compound was separated from the para-iodo isomer upon purification by flash chromatography on silica gel (0 to 15% EtOAc in hexanes, then 15% EtOAc in hexanes, then 15 to 100% EtOAc in hexanes; the title compound is the later eluting isomer): LCMS m/z 504.5 [M+H]+; 1H NMR (500 MHz, CDCl3) δ 13.08 (s, 1H), 8.17 (s, 1H), 8.10 (t, J=8.0 Hz, 1H), 8.06 (d, J=8.0 Hz, 1H), 7.86 (dd, J=7.5, 1.5 Hz, 1H), 7.82 (dd, J=8.0, 1.5 Hz, 1H), 7.52 (d, J=7.5 Hz, 1H), 6.75 (t, J=8.0 Hz, 1H), 4.33 (q, J=7.0 Hz, 2H), 1.43 (t, J=7.0 Hz, 3H).

Aufarbeitung

  1. washthe organic phase was washed successively with water, sat. aq. sodium bisulfate, and sat. aq. NaHCO3
  2. concentrationThe organic phase was then concentrated in vacuo
  3. customThe title compound was separated from the para-iodo isomer upon purification by flash chromatography on silica gel (0 to 15% EtOAc in hexanes
  4. washlater eluting isomer): LCMS m/z 504.5 [M+H]+

Quellen und Nachweise

ORD-Eintrag
ord-9f7e0fa8ca8342d283158f3879c4d962
Quelldatensatz
uspto-grants-2013_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08455638B2

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