The first example of the supramolecular regulation of amidophosphite reactivity

The cyclophosphorylation of calix[4]resorcinolarenes by aromatic diamides of phosphorous acid follows an anomalous pathway with opening of the P–O bond and preservation of one of the P–N bonds due to the interaction between the aromatic nuclei of the phosphorus-containing fragment and the calixarene matrix of the intermediate phosphorylated calixarene.