N-(Diisopropyloxyphosphoryl)amino acids (N-Dipp-amino acids) are prepared from diisopropyl phosphite and amino acids in mixed aqueous media in one step. They can be activated by dicyclohexylcarbodiimide or other activating agents for the synthesis of N-(diisopropyloxyphosphoryl)dipeptides.
GRAPHICAL ABSTRACT ABSTRACT Ten novel N-phosphoryl amino acids β-sitosterol esters were synthesized by coupling the N-phosphoryl amino acids with β-sitosterol undermicrowaveirradiation, and their structures were elucidated by IR, NMR, and HR MS. Various reaction conditions including the catalyst, solvent, temperature and time were investigated. Under the optimal conditions, the reaction was finished in