Fmoc-β-Ala-D-Tyr(Et)-OH SPPS Building Block Impurity

1️⃣ Solid-Phase Peptide Synthesis (SPPS)

In Solid-Phase Peptide Synthesis, this compound is used as a pre-assembled dipeptide building block.

Key features:

• Fmoc protects the N-terminus during peptide chain assembly

• The C-terminal –OH allows further elongation of the peptide chain

• The Et group protects the phenolic hydroxyl of tyrosine

Advantages:

• reduces coupling steps

• improves synthesis efficiency

• minimizes side reactions during peptide assembly

2️⃣ Incorporation of D-Amino Acids

The presence of D-Tyrosine provides special properties in peptides:

• increases resistance to enzymatic degradation

• improves metabolic stability

• modifies peptide conformation and receptor binding

This is common in:

• therapeutic peptide design

• peptide analog development

3️⃣ Flexible Spacer in Peptide Sequences

The β-alanine residue introduces extra spacing and flexibility in peptide chains.

Functions:

• acts as a linker/spacer

• reduces steric hindrance

• adjusts the spatial arrangement of active residues

4️⃣ Peptide Drug and Bioactive Peptide Research

This dipeptide fragment can be used in the synthesis of:

• bioactive peptides

• receptor-targeting peptides

• peptide therapeutics

• diagnostic or imaging peptides