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Acid-Catalyzed [3+2] Cycloaddition of Enones with Azomethine Imines for Easy Access to Tetrahydropyrazolopyrazolones

DOI: 10.1055/s-0036-1588678

Aluminum chloride (AlCl3) or zirconium chloride (ZrCl4) catalyzes efficiently the [3+2] cycloaddition of N,N′-cyclic azomethine imines with enones which contain the vinyl group. The scope of the reaction towards various azomethine imines and enones has been explored. Access to diastereomerically pure 6-acyl-5-aryltetrahydropyrazolo[1,2-a]pyrazol-1(5H)-ones is provided by easy chromatographic separations.

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Authors:   Jovana P. Jovanović; Goran A. Bogdanović; Ivan Damljanović
Journal:   Synlett
edition:   eFirst
Year:   2016
DOI:   10.1055/s-0036-1588678
Publication date:   15-Dec-2016
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