In chemistry hydrophosphonylation refers to any reaction where addition across a double bond generates a phosphonate (RP(O)(OR')2) group.
[1] Examples include the Kabachnik–Fields reaction, where a dialkylphosphite reacts across an imine to form an aminophosphonate.
The reaction is catalyzed by bases and is subject to organocatalysis.
[2][3] Important compounds generated by this reaction include the common herbicide glyphosate.