Boc-N-Me-Tyr(Ac)-OH · DCHA

Boc-N-Me-Tyr(Ac)-OH · DCHA is a protected tyrosine derivative bearing an N-methylated backbone, an O-acetylated phenolic side chain, and a Boc (tert-butoxycarbonyl) N-terminus, supplied as a dicyclohexylamine (DCHA) salt to support handling and consistent reactivity in peptide synthesis workflows. This protected amino acid building block is commonly used for assembling tyrosine-containing peptide segments where controlled phenolic protection and N-methylation are required to modulate coupling behavior and downstream functional group availability.

1. Solid-Phase Peptide Synthesis

Boc-N-Me-Tyr(Ac)-OH · DCHA is used by peptide synthesis groups to incorporate an N-methylated tyrosine residue into peptide sequences via standard protected-amino-acid coupling strategies. The Boc-protected nitrogen and O-acetylated phenol help maintain orthogonality during chain assembly, while the N-methyl substitution supports the preparation of peptides that include N-methylated backbone motifs for structure-property studies. Peptide manufacturers and academic peptide chemistry laboratories rely on this building block when they need a tyrosine side chain that remains protected throughout iterative coupling and deprotection steps, enabling later conversion to the free phenol at the appropriate stage of the synthesis.

2. N-Methylated Peptide Library Building

Boc-N-Me-Tyr(Ac)-OH · DCHA is a practical choice for constructing N-methylated peptide libraries for medicinal chemistry and chemical biology research, particularly when tyrosine is a key residue for receptor-binding motifs, phosphorylation-mimic design, or aromatic interaction mapping. The combination of N-methylation with phenolic O-acetyl protection supports reproducible incorporation of a structurally defined residue without prematurely exposing the phenol during library synthesis. Custom peptide synthesis providers frequently stock building blocks like this to streamline the preparation of analog panels where N-methylation is treated as a variable for conformational control and structure-activity relationship (SAR) exploration.

3. Tyrosine Side-Chain Protection Control

Boc-N-Me-Tyr(Ac)-OH · DCHA is used as a protected tyrosine building block when downstream synthetic steps require deliberate control over phenolic reactivity after peptide assembly. The O-acetyl group provides a stable, removable protection handle for the tyrosine hydroxyl, allowing the phenol to be unmasked under conditions compatible with the rest of the peptide's protecting-group set. Researchers developing modified peptide intermediates, such as those destined for subsequent phenol-specific derivatization, benefit from this defined protection pattern because it reduces undesired side reactions during coupling, purification, and global deprotection workflows.

4. Pharmaceutical Intermediate Peptide Segments

Boc-N-Me-Tyr(Ac)-OH · DCHA is also applied in the preparation of tyrosine-containing protected peptide segments used as intermediates in pharmaceutical intermediate development. Process and development chemists use N-methylated, side-chain-protected amino acid building blocks to generate well-defined fragments that can be further elaborated into larger constructs, including constrained peptide-like scaffolds and peptidomimetic precursors. The DCHA salt form supports consistent handling in synthesis operations, helping teams maintain reliable performance when scaling peptide segment preparation for downstream coupling or final assembly steps.

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