1,1'-Carbonyldiimidazole → 5-(6-chloro-4-(isopropylamino)pyridin-3-yl)-1,3,4-oxadiazol-2(3H)-one

HRID 877574

Reaktionsgleichung

Reaktionsgleichung von HRID 877574
[Cl:1][C:2]1[CH:11]=[C:10]([NH:12][CH:13]([CH3:15])[CH3:14])[C:5]([C:6]([NH:8][NH2:9])=[O:7])=[CH:4][N:3]=1.C1N=CN([C:21](N2C=NC=C2)=[O:22])C=1>CN(C=O)C>[Cl:1][C:2]1[N:3]=[CH:4][C:5]([C:6]2[O:7][C:21](=[O:22])[NH:9][N:8]=2)=[C:10]([NH:12][CH:13]([CH3:15])[CH3:14])[CH:11]=1

Komponenten

4

Edukt 2

HCID 682631,1'-CarbonyldiimidazoleHCID 896896686-Chloro-4-(isopropylamino)nicotinohydrazide

Produkt 1

HCID 896908095-(6-chloro-4-(isopropylamino)pyridin-3-yl)-1,3,4-oxadiazol-2(3H)-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

6-chloro-4-(isopropylamino)nicotinohydrazide (10) (800 mg, 3.5 mmol) was taken in DMF (4 mL). Added CDI (3.8 mmol, 1.1 equiv.) and stirred at room temperature for overnight. The reaction mass was concentrated under reduced pressure to remove excess of DMF. The residue was diluted using EtOAc, washed the EtOAc layer with water followed by brine solution. Collected the EtOAc layer, dried over Na2SO4, filtered and concentrated. The crude material obtained was taken to next step as such, without purification. LC/MS: Acquity BEH C18 2.1×50 mm, 1.8 micron; Solvent A=0.1% TFA in water; Solvent B=0.1% TFA in ACN; gradient 0-100% B over 2 min; retention time: 0.76 min; LCMS (ES-API), m/z 255.6 (M+H).

Aufarbeitung

  1. concentrationThe reaction mass was concentrated under reduced pressure
  2. customto remove excess of DMF
  3. additionThe residue was diluted
  4. washwashed the EtOAc layer with water
  5. customCollected the EtOAc layer
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-88ff40c36d964db99a7d302a6e0e7989
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08987311B2

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