Sodium Chloride → 2-Amino-3-cyano-4-methyl-5-phenylcarbonylpyridine

HRID 233611Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 233611
[NH2:1][C:2]1[C:7]([C:8]#[N:9])=[C:6]([CH3:10])[C:5](I)=[CH:4][N:3]=1.[C]=O.[C:14]1(B(O)O)[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.C(N(CC)CC)C.[Cl-].[Na+].[O:32]1CCOC[CH2:33]1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O>[NH2:1][C:2]1[C:7]([C:8]#[N:9])=[C:6]([CH3:10])[C:5]([C:33]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)=[O:32])=[CH:4][N:3]=1

Komponenten

9

Edukt 6

HCID 5234Sodium ChlorideHCID 8471TriethylamineHCID 312751,4-DioxaneHCID 66827Phenylboronic AcidHCID 113912652-Amino-5-iodo-4-methylnicotinonitrileHCID 178418416HCID 178418416, Verbindung3×

Produkt 1

HCID 197072072-Amino-3-cyano-4-methyl-5-phenylcarbonylpyridine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
65 °C

Versuchsvorschrift

A solution of 4.9 grams (0.019 mole) of 2-amino-3-cyano-5-iodo-4-methylpyridine (prepared as in Step E of Example 9) in 75 mL of dioxane is stirred, and gaseous carbon monoxide is bubbled in during a 15 minute period. While maintaining a carbon monoxide atmosphere, 4.7 grams (0.039 mole) of phenylboronic acid (commercially available), 6.8 mL (0.048 mole) of triethylamine, and 0.5 gram (catalyst) of palladium(II) acetate are in turn added. To maintain the carbon monoxide atmosphere, a balloon filled with carbon monoxide gas is then attached to the reaction vessel. The reaction mixture is then warmed to 65° C. where it is stirred for about 20 hours. The reaction mixture is then poured into a mixture of 300 mL of water and 100 mL of aqueous saturated sodium chloride solution. This mixture is extracted with two 150 mL portions of ethyl acetate. The combined extracts are dried with magnesium sulfate and filtered. The filtrate is concentrated under reduced pressure to a residue. The residue is purified using column chromatography, yielding 2-amino-3-cyano-4-methyl-5-phenylcarbonylpyridine.

Aufarbeitung

  1. customgaseous carbon monoxide is bubbled in during a 15 minute period
  2. additionadded
  3. extractionThis mixture is extracted with two 150 mL portions of ethyl acetate
  4. dry with materialThe combined extracts are dried with magnesium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate is concentrated under reduced pressure to a residue
  7. customThe residue is purified

Quellen und Nachweise

ORD-Eintrag
ord-e7c523036a4c4054b75c258d00618734
Quelldatensatz
uspto-grants-1997_01
Patentnummer
US05593998

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