Vilsmeier-Haak formylation of 3, 5-dimethylpyrazoles

…, SK Antanosyan, GA Panosyan, GV Asratyan…

Index: Attaryan; Antanosyan; Panosyan; Asratyan; Matsoyan Russian Journal of General Chemistry, 2006 , vol. 76, # 11 p. 1817 - 1819

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Citation Number: 8

Abstract

Abstract Formylation of N-alkyl-3, 5-dimethyl-1 H-pyrazoles according to Vilsmeier-Haak led to the formation of the corresponding 4-formyl derivatives. 3, 5-Dimethyl-1 H-pyrazole having no substituent on the nitrogen atom failed to undergo formylation at the 4 position under analogous conditions. 3, 5-Dimethyl-1 H-pyrazole-4-carbaldehyde was synthesized by alkaline hydrolysis of methyl β-(4-formyl-3, 5-dimethyl-1 H-pyrazol-1-yl) propionate and ...