Acetonitrile → 2-Benzylthio-5,8-dichloro[1,2,4]triazolo[1,5-a]pyridine

HRID 1898817Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1898817
C(#N)C.N(OC(C)(C)C)=O.N[C:12]1[C:13]2[N:14]([N:19]=[C:20]([S:22][CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=3)[N:21]=2)[C:15]([Cl:18])=[CH:16][CH:17]=1.[Cl:30]CCl>Cl.[Cu]Cl>[CH2:23]([S:22][C:20]1[N:21]=[C:13]2[C:12]([Cl:30])=[CH:17][CH:16]=[C:15]([Cl:18])[N:14]2[N:19]=1)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1

Komponenten

7

Edukt 4

HCID 6342AcetonitrileHCID 6344DichloromethaneHCID 10906Tert-Butyl nitriteHCID 190807288-Amino-2-benzylthio-5-chloro[1,2,4]triazolo[1,5-a]pyridine

Produkt 1

HCID 190807452-Benzylthio-5,8-dichloro[1,2,4]triazolo[1,5-a]pyridine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 62652Cuprous chlorideKatalysatorHCID 313Hydrochloric AcidLösungsmittel

Versuchsvorschrift

A mixture of 9.9 g (0.10 mol) of copper (I) chloride with 300 mL of acetonitrile was prepared and 8.7 mL (6.8 g, 0.066 mol) of 90 percent t-butyl nitrite was added with stirring. After 10 minutes 9.5 g (0.033 mol) of 8-amino-2-benzylthio-5-chloro[1,2,4]triazolo[1,5-a]pyridine was added and the reaction mixture was allowed to react with stirring for 3 days. The mixture was then diluted with dichloromethane and 2N aqueous hydrochloric acid, and after mixing this well, the phases were separated. The organic layer was washed with 2N aqueous hydrochloric acid and concentrated by evaporation under reduced pressure. The residue was chromatographed on silica gel eluting with dichloromethane to obtain 6.5 g (63 percent of theory) of the title compound as a yellow powder melting at 103°-104° C.

Aufarbeitung

  1. customwas prepared
  2. customto react
  3. stirringwith stirring for 3 days
  4. additionafter mixing this well, the phases
  5. customwere separated
  6. washThe organic layer was washed with 2N aqueous hydrochloric acid
  7. concentrationconcentrated by evaporation under reduced pressure
  8. customThe residue was chromatographed on silica gel eluting with dichloromethane

Quellen und Nachweise

ORD-Eintrag
ord-99a7c4a462434334a299efb94ae0fb2b
Quelldatensatz
uspto-grants-1996_11
Patentnummer
US05571775

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