Z-D-allo- isoleucine dicyclohexylamine salt is a protected, stereodefined amino acid derivative in which the amino acid backbone corresponds to an allo-configured isoleucine scaffold and the amino function is present as a Z-type (benzyloxycarbonyl-like) carbamate protecting group. The molecule exists as a dicyclohexylamine salt, pairing the carboxylate with the dicyclohexylamine counterion while retaining the side-chain functionality characteristic of isoleucine (branched aliphatic substituent) and presenting a protected nitrogen and a free or salt-associated carboxylate for controlled reactivity. In peptide and amino-acid derivative synthesis, this salt form and Z protection support stepwise coupling by moderating chemoselectivity and solubility during preparation of more complex amino acid and peptide intermediates, and the stereodefined allo isomer can be used in structure-activity or stereochemical studies where side-chain stereochemistry is a variable.
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