摘要：

The increasing and sustained interest has been paid to organophosphorus chemistry in the past decades owing to the discovery of more and more naturally occurring C-P compounds, which show antibacterial, antiviral, antibiotic, pesticidal, anti-cancer activity. On the other hand, heterocyclic confounds attract the attention of chemists because of their pharmaceutical importance and various applications in organic synthesis. Three building blocks, α,α-dicyano (α-cyano-α-ethoxycarbonyl) (O, O-dialkyl) phosphonyl/S-methyl ketene acetals and N-cyanoimido-(O, O-dialkyl)phosphonyl/S-methyl thiocarbonates 1,have been developed. To the best of our knowledge, there are no reports on the synthesis of benzimidazole-2-yl phosphonates, which are prepared easily by utilizing above building blocks.

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