Sodium hydride → [2-[3,5-bis(Acetoxymethyl)pyrazol-1-yl]-5-nitrophenyl]phenyl methanone

HRID 262347

Reaktionsgleichung

Reaktionsgleichung von HRID 262347
[C:1]([O:4][CH2:5][C:6]1[CH:10]=[C:9]([CH2:11][O:12][C:13](=[O:15])[CH3:14])[NH:8][N:7]=1)(=[O:3])[CH3:2].[H-].[Na+].F[C:19]1[CH:32]=[CH:31][C:30]([N+:33]([O-:35])=[O:34])=[CH:29][C:20]=1[C:21]([C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)=[O:22]>CN(C=O)C>[C:13]([O:12][CH2:11][C:9]1[CH:10]=[C:6]([CH2:5][O:4][C:1](=[O:3])[CH3:2])[N:7]([C:19]2[CH:32]=[CH:31][C:30]([N+:33]([O-:35])=[O:34])=[CH:29][C:20]=2[C:21]([C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)=[O:22])[N:8]=1)(=[O:15])[CH3:14]

Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 123775343,5-DiacetoxymethylpyrazoleHCID 12377535(2-Fluoro-5-nitrophenyl)(phenyl)methanone

Produkt 1

HCID 12377536[2-[3,5-bis(Acetoxymethyl)pyrazol-1-yl]-5-nitrophenyl]phenyl methanone

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

A solution of 4.2 g. (20 mmol) of 3,5-diacetoxymethylpyrazole in 15 ml. of DMF was added dropwise to a suspension of 960 mg. (20 mmol) of NaH (50% in mineral oil) in 25 ml. of DMF stirred at 0° and under argon. After the evolution of H2 had ceased, 4.9 g. (20 mmol) of 2-fluoro-5-nitrobenzophenone was added in one portion. After stirring at 0° for 4 hours, the mixture was poured into ice-water and extracted with EtOAc. The organic phase was washed with dil. brine, dried (MgSO4) and concentrated. The residue was chromatographed on silica gel using benzene/EtOAc (1:1) as eluent. Removal of the solvents gave crude end product as a gum which was not purified further. The nmr (CDCl3) had signals at: δ2.00 (3H, s, CH3), 2.07 (3H, s, CH3), 4.82 (2H, s, CH2), 5.10 (2 H, s, CH2) 6.33 (1H, s, C=CH), and 7.30-8.67 (8H, m, C6H5 +C6H3).

Aufarbeitung

  1. extractionextracted with EtOAc
  2. washThe organic phase was washed with dil. brine
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customThe residue was chromatographed on silica gel
  6. customRemoval of the solvents
  7. customgave crude end product as a gum which
  8. customwas not purified further

Quellen und Nachweise

ORD-Eintrag
ord-c0ea270cdfa84828a036c33256e41029
Quelldatensatz
uspto-grants-1979_05
Patentnummer
US04153799

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