Phosphorylation of proteins among other things facilitates protein–protein interactions that are important for a variety of cellular functions, including cell division. 1 Therefore, phosphate mimics viz., phosphonates and phosphoramides are valuable chemical tools to probe cellular functions. 2 For example, sphingosine-1-phosphate, is a suspect in a plethora of diseases states. 3 Due to the metabolic lability of the phosphate group on ...