4-Ethyl-3-thiosemicarbazide → N-Ethyl-N[3-[3-(ethylamino)-1,2,4-triazolo-[4,3-b]pyridazin-6-yl]phenyl]acetamide

Beteiligte Stoffe

Reaktionsschritte

A solution of 7.0 g N-ethyl-N-[3-(6-chloro-3-pyridazinyl)phenyl]acetamide and 6.0 g 4-ethyl-3-thiosemicarbazide in 200 ml ethanol was refluxed for 18 hours. The mixture was then worked up and the product chromatographed as described in Example 70. Recrystalization of the product from dichloromethane-hexane afforded 2.1 g yellow flakes, mp 171°-172° C.

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