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A Multifield Study on Dimethyl Acetylenedicarboxylate: A Reagent Able to Build a New Cycle on Diaminoimidazoles

Dmitrii Yu Vandyshev,Oleg N. Burov,Anton Lisovin,Daria A. Mangusheva,Mikhail A. Potapov,Tatiana N. Ilyinova,Khidmet S. Shikhaliev,Athina Geronikaki,Domenico Spinelli

MOLECULES（2022）

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Abstract
A new effective method for the synthesis of imidazo[1,5-b]pyridazines derivatives (yields = 68-89%) by the interaction of 1,2-diamino-4-phenylimidazole with DMAD, in methanol and in the presence of a catalytic amount of acetic acid, is proposed. The course of reaction has been examined by classical organic methods, HPLC-MS analysis, and quantum-chemical calculations.
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Key words
dimethyl acetylenedicarboxylate,imidazo[1,5-b]pyridazines,DFT calculations
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