Synthesis and Nematocidal Activity of N‐Substituted 3‐Methyl‐1H‐pyrazole‐4‐carboxamide Derivatives Against Meloidogyne incognita

A series of novel pyrazole carboxamides were designed and synthesized through multi‐step reactions from ethyl acetoacetate and triethyl orthoformate, and their structures were characterized by Fourier transform infrared, ¹H‐NMR, ¹³C‐NMR, mass spectrometry, and elemental analysis. The preliminary insecticidal activity showed that some of them possessed good insecticidal activities against Meloidogyne incognita.