Trityl-L-Phenylalanine diethylammonium salt is a protected amino acid derivative in which L-phenylalanine bears a trityl (trityl/Trt) protecting group on the amino functionality, yielding a trityl-protected phenylalanine salt form. The molecule contains a free carboxyl group and a trityl-protected amino group, with a diethylammonium counterion associated as a salt to support handling and formulation for synthesis. In peptide chemistry and related synthetic workflows, it is employed as a stepwise amino acid building block where the trityl protection controls chemoselectivity during coupling and enables preparation of phenylalanine-containing intermediates and labeled or modified peptide structures.
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