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Lithium hexamethyldisilazane → 4-(2-Fluoro-4-methylphenylamino)-1,2,5-trimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid cyclopropylmethoxy-amide

HRID 1971180
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1971180
[CH:1]1([CH2:4][O:5][NH2:6])[CH2:3][CH2:2]1.C([O:9][C:10]([C:12]1[C:17]([NH:18][C:19]2[CH:24]=[CH:23][C:22]([CH3:25])=[CH:21][C:20]=2[F:26])=[C:16]([CH3:27])[C:15](=[O:28])[N:14]([CH3:29])[C:13]=1[CH3:30])=O)C.C[Si]([N-][Si](C)(C)C)(C)C.[Li+]>C1COCC1>[CH:1]1([CH2:4][O:5][NH:6][C:10]([C:12]2[C:17]([NH:18][C:19]3[CH:24]=[CH:23][C:22]([CH3:25])=[CH:21][C:20]=3[F:26])=[C:16]([CH3:27])[C:15](=[O:28])[N:14]([CH3:29])[C:13]=2[CH3:30])=[O:9])[CH2:3][CH2:2]1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 3

HCID 2733832Lithium hexamethyldisilazaneHCID 11182605O-(cyclopropylmethyl)hydroxylamineHCID 666746314-(2-Fluoro-4-methylphenylamino)-1,2,5-trimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester

Produkt 1

HCID 576369104-(2-Fluoro-4-methylphenylamino)-1,2,5-trimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid cyclopropylmethoxy-amideAusbeute 40,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

O-cyclopropylmethyl-hydroxylamine (0.046 g, 0.527 mmol) was added to a solution of 4-(2-fluoro-4-methylphenylamino)-1,2,5-trimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester (0.070 g, 0.211 mmol) in THF (2 mL). The solution was cooled to 0° C. and lithium bis(trimethylsilyl)amide (1.05 mL, 1 M solution in hexanes) was added dropwise. The reaction mixture was warmed to room temperature. After stirring for 1 hour, the reaction was quenched by addition of a saturated aqueous solution of NaHCO3 and partitioned between EtOAc and brine. The aqueous layer was reextracted with EtOAc. The combined organic extracts were dried (Na2SO4) and concentrated. Purification by flash column (30:1 methylene chloride/MeOH) gave 0.032 g (40%) desired product as a yellow solid; MS ESI (+) m/z 374 (M+1) detected; 1H NMR (400 MHz, CD3OD) δ 6.91 (d, 1H), 6.83 (d, 1H), 6.63 (t, 1H), 3.59 (s, 3H), 3.47 (d, 2H), 2.41 (s, 3H), 2.27 (s, 3H), 1.86 (s, 3H) 0.99 (m, 1H) 0.48 (m, 2H) 0.18 (m, 2H). 19F (376 MHz, CD3OD)-132.1 (s, 1F).

Aufarbeitung

  1. temperatureThe reaction mixture was warmed to room temperature
  2. customthe reaction was quenched by addition of a saturated aqueous solution of NaHCO3
  3. custompartitioned between EtOAc and brine
  4. dry with materialThe combined organic extracts were dried (Na2SO4)
  5. concentrationconcentrated
  6. customPurification by flash column (30:1 methylene chloride/MeOH)

Quellen und Nachweise

ORD-Eintrag
ord-9e8f772f90a94ecfb7a57acd3a1e7879
Quelldatensatz
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08431574B2

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