Water → 6-Methoxy-2-(Phenylmethylthio)-3-Pyridinecarboxylic Acid, Methyl Ester

HRID 1383082Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1383082
[H-].[Na+].[CH2:3]([SH:10])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.F[C:12]1[C:17]([C:18]([O:20][CH3:21])=[O:19])=[CH:16][CH:15]=[C:14]([O:22][CH3:23])[N:13]=1.O>CN(C)C=O>[CH3:23][O:22][C:14]1[N:13]=[C:12]([S:10][CH2:3][C:4]2[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=2)[C:17]([C:18]([O:20][CH3:21])=[O:19])=[CH:16][CH:15]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 7509Benzyl mercaptanHCID 24758Sodium hydrideHCID 10821376Methyl 2-fluoro-6-methoxynicotinate

Produkt 1

HCID 143719726-Methoxy-2-(Phenylmethylthio)-3-Pyridinecarboxylic Acid, Methyl EsterAusbeute 70,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

To a stirred mixture of 0.8 g (0.0161 mol) of 50% sodium hydride (in mineral oil), which had been washed with hexanes, in 20 mL dry dimethylformamide cooled to -5° under nitrogen was added dropwise 1.9 mL (0.0161 mol) benzyl mercaptan The suspension was stirred at room temperature for 1 hour, cooled to 0°, and a solution of 3.2 g (0.0147 mol) of the product of Example 2 in 20 mL dry dimethylformamide was added dropwise. After warming to room temperature, the solution was poured into water and extracted with ether. The combined organic layers were washed with water and with brine, dried over magnesium sulfate, and evaporated to an oil which was purified by flash chromatography to afford 3.0 g (64%) of a yellow solid: m.p. 67°-71°; NMR (CDCl3, 200 MHz) 3.88 (3H, s), 3.96 (3H, s), 4.46 (2H, s), 6.44 (1 H, d, J=9 Hz), 7.2-7.5 (5H, m), 8.1 (1H, d, J=9 Hz); IR (nujol) 1700, 1580, 1305, 1255 cm-1.

Aufarbeitung

  1. washhad been washed with hexanes, in 20 mL dry dimethylformamide
  2. temperaturecooled to -5° under nitrogen
  3. temperaturecooled to 0°
  4. temperatureAfter warming to room temperature
  5. extractionextracted with ether
  6. washThe combined organic layers were washed with water and with brine
  7. dry with materialdried over magnesium sulfate
  8. customevaporated to an oil which
  9. customwas purified by flash chromatography

Quellen und Nachweise

ORD-Eintrag
ord-effafbd4690444d1827af0dc62c78cae
Quelldatensatz
uspto-grants-1989_02
Patentnummer
US04808721

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