A simple and efficient synthetic method for the preparation of alkyl H-phosphonate monoesters has been developed. The method consists of transesterification of commercially available diphenyl H-phosphonate with an appropriate alcohol under mild conditions, followed by ammonolysis of the in situ formed dialkyl and alkyl phenyl H-phosphonates.
Methods for the preparation of various 1-hydroxy-1,1-bisphosphonate partial esters were developed. They were obtained from (alkyl or phenyl) bis(trimethylsilyl) phosphite and aromatic or aliphatic acid chlorides, followed by methanolysis.