Organophosphorus compounds have found wide applications in synthetic chemistry, medicinal chemistry, and biology. Phosphonates, as a class of organophosphorus compounds, are important complement to phosphates in terms of biological activity and these aspects as well as syntheses of phosphonates have been well documented in the literature.1a1. Engel , R. 1977. Chem. Rev., 77: 349 [CrossRef], [Web of Science ®] View all references 1b2. Engel , R. 1988. ...