Ethyl orthoformate → 8-(3-Pyridinyl)-1,2,4-triazolo[4,3-a]pyridine

HRID 465129Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 465129
[NH:1]([C:3]1[C:8]([C:9]2[CH:10]=[N:11][CH:12]=[CH:13][CH:14]=2)=[CH:7][CH:6]=[CH:5][N:4]=1)[NH2:2].[CH:15](OCC)(OCC)OCC>>[N:11]1[CH:12]=[CH:13][CH:14]=[C:9]([C:8]2[C:3]3[N:4]([CH:15]=[N:2][N:1]=3)[CH:5]=[CH:6][CH:7]=2)[CH:10]=1

Komponenten

3

Edukt 2

HCID 31214Ethyl orthoformateHCID 135337152-Hydrazino-3,3'-bipyridine

Produkt 1

HCID 135337048-(3-Pyridinyl)-1,2,4-triazolo[4,3-a]pyridine

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

A mixture of 4.15 g of 2-hydrazino-3,3'-bipyridine and 30 ml of triethyl orthoformate was heated at 100° C. for 2 hours. The volatiles were removed under vacuum and the residue placed on a short pad of hydrous magnesium silicate and eluted with ethyl acetate. The product was eluted with methanol. The methanol was removed under vacuum, the residue dissolved in methylene chloride, dried and the methylene chloride boiled off while hexane was added. Chilling and filtration gave 2.67 g of off-white crystals of the desired product, mp 186°-189° C.

Aufarbeitung

  1. customThe volatiles were removed under vacuum
  2. washeluted with ethyl acetate
  3. washThe product was eluted with methanol
  4. customThe methanol was removed under vacuum
  5. dissolutionthe residue dissolved in methylene chloride
  6. customdried
  7. additionwas added
  8. temperatureChilling
  9. filtrationfiltration

Quellen und Nachweise

ORD-Eintrag
ord-a254767ab10c47e99dbee043167d147a
Quelldatensatz
uspto-grants-1985_10
Patentnummer
US04550166

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