An efficient preparative route to 7-ethyl-1hfuro2,3-gindazole

摘要

A new and efficient route to 7-ethyl-1h-furo2,3-gindazole (2)has been developed.Treatment of 4,5-dihydro-7-(1-hydroxyethyl)indazole (12)with hydrochloric acid in ethanol resulted in a concomitant dehydration and aromatization to afford the title compound in good yield.