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Ufa Institute of Chemistry, Ufa Research Centre, Russian Academy of Sciences, Prospect Oktyabrya, 71, 450054, Ufa, Russian Federation E-mail : aygumer@mail.ru Manuscript received online 19 June 2015, accepted 21 October 2016 Synthesis of 3,4-disubstituted 1H-pyrazoles based on maleopimaric acid (MPA) is described. 1,3-Dipolar cycloaddition of diazomethane with allenoates bearing maleopimaric acid methyl ester moiety afforded novel pyrazole derivatives with good regioselectivity in moderate yields. |
