Ac-p-Bz-D-Phe-OH is an N-acetylated, para-benzoyl-substituted derivative of D-phenylalanine featuring an α-amino acid backbone with a free carboxylic acid group and an amide-forming acetyl protection on the amino functionality. The molecule bears a benzoyl group on the aromatic ring of the phenyl side chain, providing an additional carbonyl-containing aromatic substituent while maintaining the D stereochemical designation specified in the name. Ac-p-Bz-D-Phe-OH is used as a protected/derivatized amino acid building block and substrate in peptide chemistry and structure-activity or labeling studies where controlled side-chain functionality and an N-acetylated amino terminus are required for stepwise synthesis, analytical standards, or preparation of more complex amino acid derivatives.
Ac-p-Bz-D-Phe-OH is an acylated, benzyl-protected derivative of D-phenylalanine, presented as a carboxylic acid suitable for downstream peptide and intermediate synthesis workflows. The D-configuration and phenyl side chain make it a useful stereodefined building block for assembling D-amino acid-containing sequences, while the N-acetyl and benzyl-protecting functionality support controlled reactivity during chemical elaboration. Researchers commonly select this type of derivative when they need a stable, pre-functionalized amino acid unit for segment coupling, stereochemically defined analog preparation, or preparation of standards and intermediates that preserve the D-Phe stereocenter.
1. D-Amino Acid Peptide Building
Ac-p-Bz-D-Phe-OH is used as a stereodefined amino acid building block for custom peptide synthesis where D-phenylalanine incorporation is required. Peptide chemists rely on pre-acylated and protected derivatives to streamline sequence assembly and to maintain the desired chemoselectivity during coupling steps in solution-phase workflows. This reagent is particularly relevant for preparing D-Phe-containing peptides, peptide fragments, and analogs used in chemical biology studies, peptide property optimization, and structure-activity relationship work.
2. Pharmaceutical Intermediate Synthesis
Ac-p-Bz-D-Phe-OH serves as a practical intermediate for medicinal chemistry programs that require D-phenylalanine-derived fragments. Pharmaceutical intermediate development teams use stereodefined amino acid derivatives to access D-amino acid motifs while controlling functional group compatibility across multi-step synthesis. The protected derivative format supports sequential elaboration toward peptidomimetic scaffolds, side-chain-modified intermediates, and D-Phe-based building blocks that can be carried into later coupling or derivatization stages.
3. Stereochemical Reference Standards
Ac-p-Bz-D-Phe-OH is also employed in analytical and method-development contexts where chemically defined, stereochemically consistent D-Phe derivatives are needed. Analytical chemistry teams use such protected amino acid derivatives to prepare reference materials for characterization workflows, including chromatographic method qualification and impurity profiling of D-amino acid-containing intermediates. The defined protection pattern and D-configuration help ensure that the reference behaves as a faithful chemical counterpart to the target stereoisomeric material during LC-based or related analytical assessments.
4. Peptidomimetic Scaffold Preparation
Ac-p-Bz-D-Phe-OH is used to generate D-phenylalanine-containing components for peptidomimetic development, including analogs that incorporate D-amino acid residues to tune chemical stability and conformational preferences in synthetic constructs. Medicinal chemistry and chemical biology groups often select protected D-Phe derivatives to support controlled downstream functionalization, enabling the preparation of fragment libraries and coupling-ready intermediates. This application is driven by the combination of a stereochemically fixed D-center and a protected amino acid framework that can be carried through scaffold assembly workflows.
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