Triethyl orthoacetate → 2-(4-Iodophenyl)-5-methyl-[1,3,4]oxadiazole

HRID 31411

Reaktionsgleichung

Reaktionsgleichung von HRID 31411
[I:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]([NH:8][NH2:9])=[O:7])=[CH:4][CH:3]=1.[C:12](OCC)(OCC)(OCC)[CH3:13]>>[I:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]2[O:7][C:12]([CH3:13])=[N:9][N:8]=2)=[CH:4][CH:3]=1

Komponenten

3

Edukt 2

HCID 66221Triethyl orthoacetateHCID 3061044-Iodobenzenecarbohydrazide2×

Produkt 1

HCID 6765692-(4-Iodophenyl)-5-methyl-[1,3,4]oxadiazole

Reaktionsbedingungen

Temperatur
130 °C

Versuchsvorschrift

Triethyl orthoacetate (10 ml) was added to 4-iodo-benzoic acid hydrazide (Intermediate 14) (0.55 g, 2.1 mmol) and heated under nitrogen at 130° C. for 3 hours. The triethyl orthoacetate was removed in vacuo and the residue partitioned between ethyl acetate (30 ml) and water (30 ml). The organic layer was washed with water (50 ml), brine (50 ml), dried over magnesium sulfate filtered and the solvent removed in vacuo. The residue was purified by silica SPE cartridge (10 g) eluting with 20:1 cyclohexane/ethyl acetate v:v to 5:1 cyclohexane/ethyl acetate v:v. The desired product was obtained as a white solid (0.31 g, 1.1 mmol).

Aufarbeitung

  1. customThe triethyl orthoacetate was removed in vacuo
  2. customthe residue partitioned between ethyl acetate (30 ml) and water (30 ml)
  3. washThe organic layer was washed with water (50 ml), brine (50 ml)
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. customthe solvent removed in vacuo
  7. customThe residue was purified by silica SPE cartridge (10 g)
  8. washeluting with 20:1 cyclohexane/ethyl acetate v

Quellen und Nachweise

ORD-Eintrag
ord-83ed388e738c4ac3a3d041d293b05383
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07425555B2

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