CAS number 2639221-78-4, English alias Boc-Tyr(tBu)-Aib-OH compound is primarily used in the field of medicinal chemistry. Its structure suggests potential applications in drug development, such as a pharmaceutical agent or as a lead compound in the synthesis of other bioactive molecules.

The following are specific applications：

1.Peptide Synthesis: CAS number 2639221-78-4, English alias Boc-Tyr(tBu)-Aib-OH is used as a building block in the synthesis of peptides, especially those with specific structural or functional properties. The protective groups allow for controlled synthesis while preventing side reactions.

2.Medicinal Chemistry: This compound may be utilized in drug development to create peptide-d drugs or to study the interactions of peptides with biological targets.

3.Structural Studies: The presence of Aib can influence the secondary structure of peptides, making this derivative useful in studying peptide folding and stability.

Overall, CAS number 2639221-78-4, English alias Boc-Tyr(tBu)-Aib-OH is a valuable compound in the toolkit of chemists working with peptide synthesis and related fields, providing essential functionality and control in constructing complex peptides.