Sodium hydride → 2,2-dimethyl-propionic acid 6-(4-fluorophenyl)-7-(2-methylsulfanyl-pyrimidin-4-yl)-5-oxo-2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-2-yl ester

HRID 1061626Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1061626
[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([N:11]2[CH2:15][CH:14]([O:16][C:17](=[O:22])[C:18]([CH3:21])([CH3:20])[CH3:19])[CH2:13][N:12]2[C:23]([C:25]2[CH:30]=[CH:29][N:28]=[C:27]([S:31][CH3:32])[N:26]=2)=O)=[O:10])=[CH:4][CH:3]=1.[H-].[Na+]>C1COCC1>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[C:9](=[O:10])[N:11]3[CH2:15][CH:14]([O:16][C:17](=[O:22])[C:18]([CH3:19])([CH3:21])[CH3:20])[CH2:13][N:12]3[C:23]=2[C:25]2[CH:30]=[CH:29][N:28]=[C:27]([S:31][CH3:32])[N:26]=2)=[CH:6][CH:7]=1

Komponenten

4

Edukt 2

HCID 24758Sodium hydrideHCID 207247342,2-Dimethyl-propionic acid 1-[2-(4-fluorophenyl)acetyl]-2-(methylsulfanyl-pyrimidine-4-carbonyl)-pyrazolidin-4-yl ester

Produkt 1

HCID 207247402,2-dimethyl-propionic acid 6-(4-fluorophenyl)-7-(2-methylsulfanyl-pyrimidin-4-yl)-5-oxo-2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-2-yl esterAusbeute 30 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

2,2-Dimethyl-propionic acid 1-[2-(4-fluorophenyl)acetyl]-2-(methylsulfanyl-pyrimidine-4-carbonyl)-pyrazolidin-4-yl ester, 33, (300 mg, 0.651 mmol) is dissolved in THF (6 mL). This solution is then added dropwise via cannula to a suspension of NaH (29 mg of a 60% dispersion in mineral oil, 0.716 mmol) at −30° C. The reaction is allowed to gradually warm to 0° C. over 3 hours. The reaction is quenched with NH4Cl (sat. aq.) (1 mL). The mixture is stirred at room temperature, then concentrated in vacuo. The residue is diluted with tetrahydrofuran (50 mL) and the mixture filtered through Celite. The filtrate is concentrated in vacuo to give an orange oil. The crude product is purified over silica (100% ethyl acetate to 5% to 10% to 20% methyl alcohol/ethyl acetate) to afford 87 mg (30% yield) of the desired product as a yellow solid.

Aufarbeitung

  1. customThe reaction is quenched with NH4Cl (sat. aq.) (1 mL)
  2. concentrationconcentrated in vacuo
  3. additionThe residue is diluted with tetrahydrofuran (50 mL)
  4. filtrationthe mixture filtered through Celite
  5. concentrationThe filtrate is concentrated in vacuo
  6. customto give an orange oil
  7. customThe crude product is purified over silica (100% ethyl acetate to 5% to 10% to 20% methyl alcohol/ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-e60d7463a6d2446db08630670a253a62
Quelldatensatz
uspto-grants-2005_11
Patentnummer
US06960593B2

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