Triethylamine → 2-(4-(((Tert-butyldimethylsilyl)oxy)methyl)phenyl)-5-ethyl-1,3,4-oxadiazole

HRID 56517Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 56517
[Si:1]([O:8][CH2:9][C:10]1[CH:19]=[CH:18][C:13]([C:14]([NH:16][NH2:17])=[O:15])=[CH:12][CH:11]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].Cl.[C:21](=N)(OCC)[CH2:22][CH3:23].CCN(CC)CC>CCO>[Si:1]([O:8][CH2:9][C:10]1[CH:11]=[CH:12][C:13]([C:14]2[O:15][C:21]([CH2:22][CH3:23])=[N:17][N:16]=2)=[CH:18][CH:19]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 107079144-(Tert-butyldimethylsilyloxy)methylbenzhydrazideHCID 13000588Ethyl propanecarboximidate hydrochloride

Produkt 1

HCID 584319792-(4-(((Tert-butyldimethylsilyl)oxy)methyl)phenyl)-5-ethyl-1,3,4-oxadiazoleAusbeute 44 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To a solution of 4-(((tert-butyldimethylsilyl)oxy)methyl)benzohydrazide (6.0 g, 21.4 mmol; reported in Tanaka, A. et al. J. Med. Chem. 1998, 41, 2390) and ethyl propionimidate hydrochloride (3.5 g, 25.7 mmol; preparation reported in WO2007/73299 A1) in EtOH (120 mL) was added Et3N (2.59 g, 25.7 mmol). The mixture was stirred at room temperature for 1 hr then concentrated in vacuo. The residue was partitioned into EtOAc and H2O and the organics were washed with H2O and brine, dried over Na2SO4 and concentrated in vacuo. Purification by chromatography (EtOAc-hexanes) gave 2-(4-(((tert-butyldimethylsilyl)oxy)methyl)phenyl)-5-ethyl-1,3,4-oxadiazole as a brown oil (3.0 g, 44% yield).

Aufarbeitung

  1. concentrationthen concentrated in vacuo
  2. customThe residue was partitioned into EtOAc and H2O
  3. washthe organics were washed with H2O and brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated in vacuo
  6. customPurification by chromatography (EtOAc-hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-e375a4f95d7d41e4b09243c73bd73eb5
Quelldatensatz
uspto-grants-2016_09
Patentnummer
US09434707B2

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