N. M. Tsizorik, Yevhenii V. Hrynyshyn, A. V. Bol’but
Nov 1, 2018
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Chemistry of Heterocyclic Compounds
Abstract
4-Chloropyrazolo[1,5-a]pyrazines react with ethyl isocyanoacetate to form ethyl imidazo[1,5-a]pyrazolo[5,1-c]pyrazine-1-carboxylates, hydrolysis of which yields the corresponding acids and reduction gives alcohols oxidized by the action of the Dess–Martin reagent to aldehydes.