抄録
α- and γ-L-Glutamyl dipeptides of L-β-phenyl-β-alanine are synthesized for the first time from L-glutamic acid and L-β-phenyl-β-alanine. In addition, the preparations and the properties of new intermediates, that is, L-β-phenyl-β-alanine benzylester p-toluenesul-fonate and the N-carbobenzyloxy-α- and γ-dipeptide benzylesters, are described. Further proof of the structure previously proposed for the naturally occurring peptide is obtained by a critical comparison of the isolated and synthetic materials by various physical and chemical methods.
