N-Cbz-L-Aspartic acid, identified by CAS 1152-61-0 and often referred to as Z-L-Asp-OH, is a derivative of the proteinogenic amino acid L-aspartic acid. In this molecule, the amino group is protected by a benzyloxycarbonyl (Cbz or Z) group, which serves as a vital temporary masking agent during complex chemical transformations. It typically appears as a white to off-white crystalline powder and is valued for its high optical purity and stability under standard laboratory conditions.
This compound is a fundamental building block in the field of organic chemistry and peptide engineering. By shielding the N-terminus, it allows for the selective reaction of the carboxylic acid groups, facilitating the construction of specific peptide sequences without unwanted side reactions. Its handling requires standard laboratory precautions, typically involving storage in a cool, dry environment to maintain its chemical integrity for sensitive synthesis applications.