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

Participants

Reaction Conditions

Reaction Steps

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.

Provenance & Evidence