Pivaloyl chloride → N-(3-chloro[1,2,4]triazolo[4,3-b]pyridazin-6-yl)-2,2-dimethylpropanamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 193 mg of 3-chloro[1,2,4]triazolo[4,3-b]pyridazin-6-amine and 0.14 cm3 of pivaloyl chloride in 5 cm3 of pyridine is stirred for 5 h at 20° C. 0.14 cm3 of pivaloyl chloride is again added and the mixture is left to stir overnight. The reaction medium obtained is concentrated to dryness under vacuum. The residue is washed with ethyl ether and pentane. The precipitate is taken up in a solution of ammonium chloride and then extracted with a 90/10 ethyl acetate/methanol mixture. The organic phase is evaporated to dryness. 157 mg of N-(3-chloro[1,2,4]triazolo[4,3-b]pyridazin-6-yl)-2,2-dimethylpropanamide are thus obtained in the form of a brown powder, the characteristics of which are as follows:

Provenance & Evidence