Summary Syntheses of two model high-energy phosphorus compounds derived from glycine are described. B 0th ph thal ylglycyl di benzyl phosphate and N-carbobenzoxyglycyl dibenzyl phosphate have the properties of acylating agents. In addition, it has been demonstrated that phthalylglycyl dibenzyl phosphate reacts with glycine and with m- phenylalanine to form phthalyl peptides under simulated physiological conditions. These ...