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Sodium Carbonate → (3R,4S)-4-(2',4'-Dichlorobiphenyl-4-yloxy)-1-pyridin-3-yl-pentan-3-ol

HRID 379983
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 379983
[Si]([O:8][C@H:9]([CH2:22][CH2:23][C:24]1[CH:25]=[N:26][CH:27]=[CH:28][CH:29]=1)[C@H:10]([CH3:21])[O:11][C:12]1[CH:17]=[CH:16][C:15](B(O)O)=[CH:14][CH:13]=1)(C(C)(C)C)(C)C.Br[C:31]1[CH:36]=[CH:35][C:34]([Cl:37])=[CH:33][C:32]=1[Cl:38].C(=O)([O-])[O-].[Na+].[Na+]>C1(C)C=CC=CC=1.C(O)C.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:37][C:34]1[CH:33]=[C:32]([Cl:38])[CH:31]=[CH:36][C:35]=1[C:15]1[CH:14]=[CH:13][C:12]([O:11][C@@H:10]([CH3:21])[C@H:9]([OH:8])[CH2:22][CH2:23][C:24]2[CH:25]=[N:26][CH:27]=[CH:28][CH:29]=2)=[CH:17][CH:16]=1
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Komponenten

7

Edukt 3

HCID 10340Sodium CarbonateHCID 709471-Bromo-2,4-dichlorobenzeneHCID 54020751(1S,2R)-4-[2-(tert-butyldimethylsilanyloxy)-1-methyl-4-pyridin-3-ylbutoxy]benzeneboronic acid

Produkt 1

HCID 57313338(3R,4S)-4-(2',4'-Dichlorobiphenyl-4-yloxy)-1-pyridin-3-yl-pentan-3-olAusbeute 33 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418397
HCID 178418397, Verbindung
Katalysator
HCID 702EthanolLösungsmittel
HCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

Prepared according to the method described in Example 12b) from (1S,2R)-4-[2-(tert-butyldimethylsilanyloxy)-1-methyl-4-pyridin-3-ylbutoxy]benzeneboronic acid (0.20 g, Example 11)), 1-bromo-2,4-dichlorobenzene (0.218 g), 2M aqueous sodium carbonate (0.5 ml) and tetrakis(triphenylphosphine)palladium (0) (0.020 g)in toluene (5 ml) and ethanol (2 ml). The reaction mixture was heated at 100° C. under nitrogen for 4 hours. After cooling, the solution was concentrated under reduced pressure. Concentrated hydrochloric acid (1 ml) was added to a solution of the residue in methanol (5 ml) and the suspension was stirred at room temperature for 5 hours. The mixture was concentrated under reduced pressure and the residue partitioned between diethyl ether and water. The aqueous layer was neutralised with sodium hydrogen carbonate solution (in water) and the aqueous solution was extracted with ethyl acetate. The combined organic phases were dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by normal-phase HPLC eluting with a gradient of 0-25% ethanol in dichloromethane to give a solid (0.064 g) from which the oxalate salt was prepared (0.054 g).

Aufarbeitung

  1. customPrepared
  2. temperatureAfter cooling
  3. concentrationthe solution was concentrated under reduced pressure
  4. additionConcentrated hydrochloric acid (1 ml) was added to a solution of the residue in methanol (5 ml)
  5. concentrationThe mixture was concentrated under reduced pressure
  6. customthe residue partitioned between diethyl ether and water
  7. extractionthe aqueous solution was extracted with ethyl acetate
  8. dry with materialThe combined organic phases were dried over anhydrous magnesium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure
  11. customThe residue was purified by normal-phase HPLC
  12. washeluting with a gradient of 0-25% ethanol in dichloromethane

Quellen und Nachweise

ORD-Eintrag
ord-19d5bf3b0bc14e0a97b21f77e4775478
Quelldatensatz
uspto-grants-2001_10
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06300352B1

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