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The hydrazones (I) react with the silane (II) to give the 6‐membered cyclic ylides (III) or the 5‐membered compounds (IV) depending on the configuration of (I).

N-Mono-alkylated imidazoles and benzimidazoles were prepared both by the traditional method and by microwave-assisted reaction. Their dialkylated salts were obtained, which are precursors for carbenes and novel 1,3-dialkylated imidazol-2-ilidenes and -benzimidazol-2-ilidenes.