Abstract: | The esters of 4-hydroxy-5-phosphinyl-2-imidazolidinone were prepared by reaction of urea with the esters of 2-hydroxy-2-phosphinylethanal in acidic medium. The ir, 1H nmr and 31P nmr spectral data of the products are reported. All the isolated products had cis configuration. The stereochemistry of their formation is discussed. |