New phosphonic analogs of aspartic and glutamic acid by aminoalkylation of trivalent phosphorus chlorides with ethyl acetyloacetate or ethyl levulinate and benzyl carbamate
Abstract Reaction of C-ethyl esters of phosphonic- and phosphinic acidanalogues of glutamic and aspartic acids with ethyl orthoformate provides the mixtures of N-formylamino- and N-ethoxymethyleneimino-derivatives with nearly quantitative yields. Scope and limitations of this procedure were studied by means of GC/MS technique.