Z-allo-Thr(tBu)-OH · DCHA contains an allo-threonine amino acid framework bearing a tert-butyl-substituted side-chain protection motif and a Z (benzyloxycarbonyl, Cbz-like) carbamate on the amino functionality, with a free carboxylic acid group indicated by the "-OH" suffix. The molecule therefore presents a protected α-amino group (as the Z-protected carbamate), a carboxylic acid suitable for salt formation, and a tert-butyl-bearing side-chain substituent consistent with a sterically modified threonine derivative, while the "· DCHA" denotes association with dicyclohexylamine as a counterion for the corresponding salt form. In synthesis and chemical biology workflows, this protected amino acid salt is used as a stepwise building block for preparing threonine-containing peptide derivatives and for controlling chemoselectivity during coupling by keeping the α-amino group protected while retaining the carboxyl functionality for activation and bond formation.
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