L-Glutamic acid di-tert-butyl ester may be useful in the synthesis of substance P antagonistic peptides.
M Antoniou; C Poulos; T Tsegenidis. Synthesis and biological activity of analogues of the C-terminal hexapeptide of substance P with modifications at glutaminyl and methioninyl residues. Structure-activity studies. International Journal of Peptide and Protein Reseach. 1992, 40(5), 395-400.
A Manolopoulou; K Karagiannis; G Stavropoulos; C Poulos; C C Jordan; R M Hagan. Synthesis of potent antagonists of substance P by modifying the methionyl and glutaminyl residues of its C-terminal hexapeptide and without using D-amino acids. International Journal of Peptide and Protein Reseach. 1993, 41(4), 411-414.