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Cesium carbonate → 4-Chloro-3-(2-(4-fluorophenyl)furo[2,3-b]pyridin-5-yl)benzoic acid

HRID 44084
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 44084
C(=O)([O-])[O-].[Cs+].[Cs+].Br[C:8]1[CH:9]=[C:10]2[CH:16]=[C:15]([C:17]3[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=3)[O:14][C:11]2=[N:12][CH:13]=1.B([C:27]1[CH:28]=[C:29]([CH:33]=[CH:34][C:35]=1[Cl:36])[C:30]([OH:32])=[O:31])(O)O>CN(C=O)C.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:36][C:35]1[CH:34]=[CH:33][C:29]([C:30]([OH:32])=[O:31])=[CH:28][C:27]=1[C:8]1[CH:9]=[C:10]2[CH:16]=[C:15]([C:17]3[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=3)[O:14][C:11]2=[N:12][CH:13]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 3

HCID 10796Cesium carbonateHCID 177502283-Borono-4-chlorobenzoic acidHCID 592337145-Bromo-2-(4-fluorophenyl)furo[2,3-b]pyridine

Produkt 1

HCID 672170504-Chloro-3-(2-(4-fluorophenyl)furo[2,3-b]pyridin-5-yl)benzoic acidAusbeute 47 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418397
HCID 178418397, Verbindung
Katalysator
HCID 962WaterLösungsmittel
HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
180 °C

Versuchsvorschrift

Cesium carbonate (167 mg, 0.514 mmol) was added to Pd(Ph3P)4 (40 mg, 0.034 mmol), 5-bromo-2-(4-fluorophenyl)furo[2,3-b]pyridine (100 mg, 0.342 mmol), 3-borono-4-chlorobenzoic acid (103 mg, 0.514 mmol) in DMF (3 mL) and Water (0.3 mL) at room temperature. The mixture was degassed 3× and the reaction was heated to 180° C. in the microwave for 10 min. The mixture was diluted with EtOAc and washed with 1M HCl, and sat NaCl. The organic phase was dried over Na2SO4, filtered and concentrated. The crude product was triturated with MeOH to give the expected product 4-chloro-3-(2-(4-fluorophenyl)furo[2,3-b]pyridin-5-yl)benzoic acid (59 mg, 0.160 mmol, 47% yield) consistent by LCMS and NMR. 1H NMR (400 MHz, DMSO-d6) δ ppm 13.22 (1H, br. s.), 8.36 (1H, d, J=2.26 Hz), 8.25 (1H, d, J=2.26 Hz), 8.03-8.11 (2H, m), 7.97-8.02 (2H, m), 7.77 (1H, d, J=7.78 Hz), 7.55 (1H, s), 7.41 (2H, t, J=8.78 Hz). LC-MS retention time: 1.15 min; m/z (MH+): 368. LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Waters XBridge 5u C18 4.6×50 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 5 ml/min, a gradient of 100% solvent A/0% solvent B to 0% solvent A/100% solvent B, a gradient time of 2 min, a hold time of 1 min, and an analysis time of 3 min where solvent A was 5% acetonitrile/95% H2O/10 mM ammonium acetate and solvent B was 5% H2O/95% acetonitrile/10 mM ammonium acetate. MS data was determined using a Micromass Platform for LC in electrospray mode.

Aufarbeitung

  1. customThe mixture was degassed 3×
  2. additionThe mixture was diluted with EtOAc
  3. washwashed with 1M HCl
  4. dry with materialThe organic phase was dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was triturated with MeOH

Quellen und Nachweise

ORD-Eintrag
ord-be1299c78d004c659f07f98cd0f849e6
Quelldatensatz
uspto-grants-2013_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08536338B2

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