Trifluoroacetic acid → 2-Amino-1-(5-phenyl-[1,2,4]oxadiazol-3-yl)-butan-1-ol

HRID 1765681Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1765681
C(OC(=O)[NH:7][CH:8]([CH:11]([OH:24])[C:12](=[NH:23])[NH:13][O:14][C:15](=O)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[CH2:9][CH3:10])(C)(C)C.FC(F)(F)C(O)=O>COCCOCCOC.ClCCl>[NH2:7][CH:8]([CH2:9][CH3:10])[CH:11]([C:12]1[N:23]=[C:15]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[O:14][N:13]=1)[OH:24]

Komponenten

5

Edukt 2

HCID 6422Trifluoroacetic acidHCID 178458006[(Z)-[1-amino-2-hydroxy-3-[(2-methylpropan-2-yl)oxycarbonylamino]pentylidene]amino] benzoate

Produkt 1

HCID 220540072-Amino-1-(5-phenyl-[1,2,4]oxadiazol-3-yl)-butan-1-olAusbeute 29,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6344DichloromethaneLösungsmittelHCID 8150DiglymeLösungsmittel

Versuchsvorschrift

A solution of (3) (1.5 g, 4.3 mmol) in diglyme was heated at 150° C. in a microwave reactor (Smith Creator, S00219) for 40 minutes. Solvent evaporated under vacuum in Genevac Evaporator at 80° C. for 3 hours to give a brown solid. This was taken in dichloromethane (40 ml) and treated with trifluoroacetic acid at room temperature for 2 hours. Solvent evaporated to dryness under reduced pressure, crude taken in water, washed with DCM, aqueous layer basified with 1M NaOH solution and extracted with dichloromethane. Organic layer dried over Na2SO4 and evaporated under reduced pressure to give 2-amino-1-(5-phenyl-[1,2,4]oxadiazol-3-yl)-butan-1-ol (300 mg) as a pale brown solid. 1HNMR (CDCl3) 8.14–8.10 (m, 2H), 7.59–7.47 (m, 3H), 4.83 & 4.65 (d, J=5 Hz, 1H), 3.18–3.05 (2m, 1H), 1.71–1.20 (m, 2H), 1.05–0.97 (2×t, J=7.2 Hz, 3H).

Aufarbeitung

  1. customSolvent evaporated under vacuum in Genevac Evaporator at 80° C. for 3 hours
  2. customto give a brown solid
  3. customSolvent evaporated to dryness under reduced pressure, crude
  4. washwashed with DCM, aqueous layer
  5. extractionextracted with dichloromethane
  6. dry with materialOrganic layer dried over Na2SO4
  7. customevaporated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-80eb387bc97047c8a0acf1ff0f18676b
Quelldatensatz
uspto-grants-2007_06
Patentnummer
US07226921B2

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