Abstract
Carboxyphosphonic and phosphinic acids have recently found applications in the diverse fields of industrial water treatment and pesticides. For example, the acids 1 and 2 are ferrous corrosion inhibitors and scale control agents for circulating industrial water systems, the amino acid 3 is a translocateable total herbicide and the naturally occurring glutamic acid analogue 4 has antibacterial, fungicidal and herbicidal properties. This paper presents a selection of our results on the synthesis of new carboxyphosphonic and phosphinic acids which led to corrosion and scale control agents and structures related to natural products, and their postulated biogenetic precursors.