Sodium Bicarbonate → 3-Ethyl-5-[1-(2-fluoro-4-[(5-nitro-2-furyl)methyl]aminophenyl)-4-piperidyl]-2,3-di hydro-1,3,4-oxadiazol-2-one

HRID 515436Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 515436
[CH2:1]([N:3]1[N:7]=[C:6]([CH:8]2[CH2:13][CH2:12][N:11]([C:14]3[CH:19]=[CH:18][C:17](/[N:20]=[CH:21]/[C:22]4[O:23][C:24]([N+:27]([O-:29])=[O:28])=[CH:25][CH:26]=4)=[CH:16][C:15]=3[F:30])[CH2:10][CH2:9]2)[O:5][C:4]1=[O:31])[CH3:2].C([BH3-])#N.[Na+].C(=O)(O)[O-].[Na+]>CC(O)=O.CO>[CH2:1]([N:3]1[N:7]=[C:6]([CH:8]2[CH2:9][CH2:10][N:11]([C:14]3[CH:19]=[CH:18][C:17]([NH:20][CH2:21][C:22]4[O:23][C:24]([N+:27]([O-:29])=[O:28])=[CH:25][CH:26]=4)=[CH:16][C:15]=3[F:30])[CH2:12][CH2:13]2)[O:5][C:4]1=[O:31])[CH3:2]

Komponenten

6

Edukt 3

HCID 516892Sodium BicarbonateHCID 5003444Sodium cyanoborohydrideHCID 178463008HCID 178463008, Verbindung

Produkt 1

HCID 716170433-Ethyl-5-[1-(2-fluoro-4-[(5-nitro-2-furyl)methyl]aminophenyl)-4-piperidyl]-2,3-di hydro-1,3,4-oxadiazol-2-oneAusbeute 83 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 176Acetic AcidKatalysatorHCID 887MethanolLösungsmittel

Versuchsvorschrift

3-Ethyl-5-[1-(2-fluoro-4-[(E)-1-(5-nitro-2-furyl)methylidene]aminophenyl)-4-piperidyl]-2,3-dihydro-1,3,4-oxadiazol-2-one (9 g, 0.43 g, 1 mmol) on reduction with sodiumcyanoborohydride (0.12 g, 2 mmol) in the presence of catalytic amount of CH3COOH (3 drops) in methanol at 0° C. for 12 h. After completion of the reaction as indicated by TLC, the reaction mixture is neutralized with sodium bi carbonate and extracted into chloroform. The crude product thus obtained was purified by column chromatography using ethyl acetate-hexane (8:2) as eluant to obtain product 3-ethyl-5-[1-(2-fluoro-4-[(5-nitro-2-furyl)methyl]aminophenyl)-4-piperidyl]-2,3-dihydro-1,3,4-oxadi azol-2-one (10g, 357 mg, 83%).

Aufarbeitung

  1. customAfter completion of the reaction
  2. extractionextracted into chloroform
  3. customThe crude product thus obtained
  4. customwas purified by column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-16287b7a877f475b9a495640abf428d3
Quelldatensatz
uspto-grants-2015_08
Patentnummer
US09108960B2

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